Parser for HTM files (FrontPage 6)

Hello forum, 

I'm faced with an old HTML code of the Microsoft FrontPage 6. The Files are with HTM extension. 

I tried the default HTML parser but this seems to be an invalid option because I have to adjust the paths for the pictures in the links. 

E. g.: 

Source (DE): <IMG height= 10 src=:"z_HTM/Pictures/x.gif" width= 11 border =0>

Target (EN):  <IMG height= 10 src="../Pictures/x.gif' width= 11 border=0>

Any other suggestions for a parser?