This is the macro. The error is "Expecting a valid data type (eg. Integer)." and it higlights "Dim XLIFFDoc As DOMDocument".
Downloadable here www.translatum.gr/.../index.php

'#Reference {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}#6.0#0#C:\WINDOWS\system32\msxml6.dll#Microsoft XML, v6.0
''Export files to XLIFF document for processing in a TM system
''Import translated XLIFF documents
' -------------------------------
' Version 1.0 Laszlo Kovacs 13 April August 2009.
' -------------------------------
' Macro executes on:
' Projects Active/opened translation bundles.
' Source lists N/A
' Target lists ALL
' ===============================


Option Explicit

Dim translst As PslTransList
Dim translsts As PslTransLists
Dim transstr As PslTransString
Dim i, j As Long
Dim myBundle As PslProject
Dim ExportTranslated, ExportForReview, ExportUntranslated As Boolean
Dim source_language, target_language As String

Const ForWriting = 2


Private Sub ExportXLIFFFile()

 Dim fso As Object

 Dim XLIFFDoc As DOMDocument
 Dim XLIFFElem As IXMLDOMElement
 Dim newFileNode As IXMLDOMElement
 Dim newStringNode As IXMLDOMElement
 Dim newSourceString As IXMLDOMElement
 Dim newTargetString As IXMLDOMElement
 Dim newNoteString As IXMLDOMElement
 Dim rdr As New SAXXMLReader
 Dim wrt As New MXXMLWriter
 Dim XLIFFfile As Object
 Dim FileStringCount As Integer


 Set fso = CreateObject("Scripting.FileSystemObject")


 ' Create the XLIFF object

 Set XLIFFDoc=CreateObject("Msxml2.DOMDocument")

 XLIFFDoc.async=False
 XLIFFDoc.preserveWhiteSpace=True



 PSL.Output ("Preparing XLIFF data...")


 ' Create the root node.

 Set XLIFFElem = XLIFFDoc.createNode(1,"xliff","")
 XLIFFElem.setAttribute("version","1.2")
 XLIFFDoc.documentElement = XLIFFElem



 For i = 1 To myBundle.TransLists.Count
 Set translst = myBundle.TransLists(i)

 If LCase(PSL.GetLangCode(translst.Language.LangID,pslCodeTrados))=target_language Then
 source_language =LCase(PSL.GetLangCode(translst.SourceList.LangID,pslCodeTrados))

 PSL.Output ("Processing "+ CStr(i) + "/" + CStr(myBundle.TransLists.Count) + " - " + translst.Title)
 Set newFileNode = XLIFFDoc.createNode(1,"file","")
 newFileNode.setAttribute("original",StrReverse(Left(StrReverse(translst.TargetFile),(InStr(StrReverse(translst.TargetFile), "\") - 1))))
 newFileNode.setAttribute("source-language",source_language)
 newFileNode.setAttribute("target-language",target_language)
 newFileNode.setAttribute("datatype","plaintext")


 XLIFFElem.appendChild(newFileNode)
 FileStringCount=0


 On Error GoTo nextStringList
 For j = 1 To translst.StringCount
 Set transstr = translst.String(j)

 If ExportTranslated And transstr.State(pslStateTranslated) Then
 FileStringCount=FileStringCount+1
 Set newStringNode = XLIFFDoc.createNode(1,"trans-unit","")
 newStringNode.setAttribute("id",transstr.ID)
 newStringNode.setAttribute("approved","yes")
 newStringNode.setAttribute("translate","yes")
 newFileNode.appendChild(newStringNode)

 Set newSourceString = XLIFFDoc.createNode(1,"source","")
 newSourceString.Text= transstr.SourceText
 newStringNode.appendChild(newSourceString)

 Set newTargetString = XLIFFDoc.createNode(1,"target","")
 newTargetString.Text= transstr.Text
 newStringNode.appendChild(newTargetString)

 Set newNoteString = XLIFFDoc.createNode(1,"note","")
 newNoteString.Text= translst.Title + " - " + transstr.Description + Chr(13) + "Passolo Comment: " + transstr.Comment
 newStringNode.appendChild(newNoteString)




 ElseIf ExportForReview And transstr.State(pslStateReview) Then
 FileStringCount=FileStringCount+1
 Set newStringNode = XLIFFDoc.createNode(1,"trans-unit","")
 newStringNode.setAttribute("id",transstr.ID)
 newStringNode.setAttribute("approved","no")
 newStringNode.setAttribute("translate","yes")
 newFileNode.appendChild(newStringNode)

 Set newSourceString = XLIFFDoc.createNode(1,"source","")
 newSourceString.Text= transstr.SourceText
 newStringNode.appendChild(newSourceString)

 Set newTargetString = XLIFFDoc.createNode(1,"target","")
 newTargetString.Text= transstr.Text
 newStringNode.appendChild(newTargetString)

 Set newNoteString = XLIFFDoc.createNode(1,"note","")
 newNoteString.Text= translst.Title + " - " + transstr.Description + Chr(13) + "Passolo Comment: " + transstr.Comment
 newStringNode.appendChild(newNoteString)



 ElseIf ExportUntranslated And Not transstr.State(pslStateTranslated) And transstr.SourceText<>"" And Not transstr.State(pslStateReadOnly) Then
 FileStringCount=FileStringCount+1
 Set newStringNode = XLIFFDoc.createNode(1,"trans-unit","")
 newStringNode.setAttribute("id",transstr.ID)
 newStringNode.setAttribute("approved","no")
 newStringNode.setAttribute("translate","yes")
 newFileNode.appendChild(newStringNode)

 Set newSourceString = XLIFFDoc.createNode(1,"source","")
 newSourceString.Text= transstr.SourceText
 newStringNode.appendChild(newSourceString)

 Set newTargetString = XLIFFDoc.createNode(1,"target","")
 newTargetString.Text= ""
 newStringNode.appendChild(newTargetString)

 Set newNoteString = XLIFFDoc.createNode(1,"note","")
 newNoteString.Text= translst.Title + " - " + transstr.Description + Chr(13) + "Passolo Comment: " + transstr.Comment
 newStringNode.appendChild(newNoteString)


 End If

 Next j

 If FileStringCount=0 Then XLIFFElem.removeChild(newFileNode)


 nextstringlist:
 If Err.Description <>"" Then
 PSL.Output("Skipping " & translst.Title & ": " & Err.Description)
 Err.Clear
 End If
 Else
 PSL.Output("Skipping " & translst.Title & ": the language does not match")
 End If
 Next i


 wrt.byteOrderMark = False
 wrt.omitXMLDeclaration = False
 wrt.indent = True
 wrt.standalone=True
 wrt.encoding="UTF-8"


 'Set the XML writer to the SAX content handler.
 Set rdr.contentHandler = wrt
 Set rdr.dtdHandler = wrt
 Set rdr.errorHandler = wrt
 rdr.putProperty "xml.org/.../lexical-handler", wrt
 rdr.putProperty "xml.org/.../declaration-handler", wrt
 'Parse the DOMDocument object.
 rdr.parse XLIFFDoc

 'Open the file for writing

 Set XLIFFfile = fso.OpenTextFile(myBundle.Location & "\" & myBundle.Name & "_" & target_language & ".xlf" , ForWriting, True, True)
 XLIFFfile.Write (wrt.Output)


' XLIFFDoc.Save(myBundle.Location & "\" & myBundle.Name & ".xlf")


End Sub

Private Sub ImportXLIFFFile()

 Dim ImportSuccess, ImportAll, ImportFail As Long
 Dim Translatable As Boolean
 Dim XLIFFDoc As DOMDocument
 Dim XLIFFElem As IXMLDOMElement
 Dim newFileNode As IXMLDOMElement
 Dim newStringNode As IXMLDOMElement
 Dim newSourceString As IXMLDOMElement
 Dim newTargetString As IXMLDOMElement
 Dim newNoteString As IXMLDOMElement
 ' Create the XLIFF object

 Set XLIFFDoc=CreateObject("Msxml2.DOMDocument")

 XLIFFDoc.async=False



 PSL.Output ("Reading XLIFF data...")

 XLIFFDoc.load("file://" & myBundle.Location & "\" & myBundle.Name & "_" & target_language & ".xlf")

 Set XLIFFElem = XLIFFDoc.documentElement


 If XLIFFDoc.parseError.reason = "" Then

 For i = 1 To myBundle.TransLists.Count
 ImportSuccess=0
 ImportFail=0
 ImportAll=0
 Set translst = myBundle.TransLists(i)

 Set newFileNode = XLIFFElem.firstChild

 While Not newFileNode Is XLIFFElem.lastChild And newFileNode.attributes.getNamedItem("original").Text <> StrReverse(Left(StrReverse(translst.TargetFile),(InStr(StrReverse(translst.TargetFile), "\") - 1)))
 Set newFileNode = newFileNode.nextSibling
 Wend

 If newFileNode.attributes.getNamedItem("original").Text=StrReverse(Left(StrReverse(translst.TargetFile),(InStr(StrReverse(translst.TargetFile), "\") - 1))) Then


 For j = 1 To translst.StringCount

 Set transstr = translst.String(j)

 Translatable= (Not transstr.State(pslStateTranslated) Or transstr.State(pslStateReview)) And Not transstr.State(pslStateReadOnly) And Not transstr.State(pslStateLocked)

 If Translatable Then

 ImportAll = ImportAll + 1

 Set newStringNode = newFileNode.firstChild

 While Not newStringNode Is newFileNode.lastChild And Not (newStringNode.attributes.getNamedItem("id").Text=CStr(transstr.ID) And newStringNode.firstChild.Text = Trim(transstr.SourceText))
 Set newStringNode = newStringNode.nextSibling
 Wend

 If newStringNode.attributes.getNamedItem("id").Text = CStr(transstr.ID) And newStringNode.firstChild.Text = Trim(transstr.SourceText) Then
 transstr.Text= Replace(transstr.SourceText, Trim(transstr.SourceText), newStringNode.firstChild.nextSibling.Text)
 transstr.State(pslStateTranslated)=True
 transstr.State(pslStateReview)=True
 ImportSuccess=ImportSuccess+1
 Else
 ImportFail=ImportFail+1
 End If
 End If

 Next j

 translst.Save

 PSL.Output ("Processed "+ CStr(i) + "/" + CStr(myBundle.TransLists.Count) + " - " + translst.Title+" Translated "+CStr(ImportSuccess)+" of "+CStr(ImportAll) + " strings")

 End If
 Next i
 Else
 PSL.Output ("Processing failed: "+ XLIFFDoc.parseError.reason)
 End If


End Sub



Sub Main

 Dim Bundle As PslProject
 Dim TargetLanguageList() As String
 Dim knownLang As Boolean

 ReDim TargetLanguageList(0)

 PSL.OutputWnd.Clear
 PSL.Output("Scanning open bundles for target languages...")

 For Each Bundle In PSL.Projects
 For Each translst In Bundle.TransLists
 target_language = LCase(PSL.GetLangCode(translst.Language.LangID,pslCodeTrados))
 knownLang=False
 For i=0 To UBound(TargetLanguageList)

 If TargetLanguageList(i) = target_language Then knownLang=True
 Next
 If Not knownLang Then
 If TargetLanguageList(UBound(TargetLanguageList))<>"" Then ReDim Preserve TargetLanguageList(UBound(TargetLanguageList)+1)
 TargetLanguageList(UBound(TargetLanguageList))=target_language
 End If
 Next
 Next



 Begin Dialog UserDialog 690,364,"Export and import XLIFF" ' %GRID:10,7,1,1
 GroupBox 10,7,670,56,"Scope",.grpScope
 GroupBox 10,63,670,252,"Operation",.grpOperation
 PushButton 420,329,130,21,"Start",.cmdOK
 CancelButton 570,329,100,21,.cmdCancel
 Text 10,343,90,14,"v.1.0",.lblMacroVersion
 Text 60,280,610,28,"Import reads the following XLIFF file: <Path_of_Passolo_Bundle>\<Name_of_Passolo_Bundle>_<lang>.xlf",.lblInstruction
 Text 70,91,450,28,"Export creates the following XLIFF file: <Path_of_Passolo_Bundle>\<Name_of_Passolo_Bundle>_<lang>.xlf",.lblInstruction2
 GroupBox 50,119,620,140,"Status Filter",.grpStatus
 CheckBox 60,210,400,14,"Export Translated strings",.ExportTranslated
 CheckBox 60,168,400,14,"Export ForReview strings",.ExportForReview
 CheckBox 60,140,400,14,"Export untranslated strings",.ExportUntranslated
 Text 90,154,560,14,"The XLIFF attribute of untranslated strings is NOT approved, the target string is empty",.lblExportUntranslated
 Text 100,224,550,28,"The XLIFF attribute of translated strings is approved, the target string contains the current text in Passolo",.lblExportTranslated
 Text 90,182,550,28,"The XLIFF attribute of For review strings is NOT approved, the target string contains the current text in Passolo",.lblExportForReview
 OptionGroup .ExportImport
 OptionButton 30,77,190,14,"Export for translation",.optExport
 OptionButton 20,266,190,14,"Import translations",.optImport
 OptionGroup .ScopeOption
 OptionButton 30,21,200,14,"Process the active bundle",.optActiveBundle
 OptionButton 30,42,220,14,"Process all opened bundles",.optAllOpenedBundles
 Text 310,21,180,14,"Target language to extract:",.lblLanguage
 DropListBox 510,21,90,70,TargetLanguageList,.lstLanguage,1
 End Dialog

 Dim dlg As UserDialog

 dlg.lstLanguage=TargetLanguageList(0)
 If PSL.Projects.Count=1 Then dlg.ScopeOption=0
 If PSL.Projects.Count>1 Then dlg.ScopeOption=1
 dlg.ExportImport=0
 dlg.ExportTranslated=True
 dlg.ExportForReview=True
 dlg.ExportUntranslated=True

 If Dialog(dlg) = 0 Then
 Exit Sub
 Else

 target_language = dlg.lstLanguage
 ExportTranslated=dlg.ExportTranslated
 ExportForReview=dlg.ExportForReview
 ExportUntranslated=dlg.ExportUntranslated
 If dlg.ScopeOption =0 Then
 Set myBundle = PSL.ActiveProject
 If dlg.exportimport=0 Then
 ExportXLIFFFile
 Else
 ImportXLIFFFile
 End If
 Else
 For Each Bundle In PSL.Projects
 Set myBundle = Bundle
 PSL.Output("Processing " & myBundle.Name)
 If dlg.exportimport=0 Then
 ExportXLIFFFile
 Else
 ImportXLIFFFile
 End If
 Next
 End If
 End If

 Done:
 PSL.Output ("--- Done ---")

End Sub