> I forgot to tell you that all these errors with latest 
> releases Win-HTTRACK (3.2x at least) are caused maybe by 
> the fact that your install take as reference ROOT C: 
> instead of a relative address to operating system.  

Humm, this should be handled by innosetup automatically.. 
I'll check that!

> Could be your MFC42.DLL another cause or registry ?
Yes ; please download it at
<http://www.httrack.com/splitted/mfc/mfc42.dll.zip>

and uncompress it in the winhttrack "program files" 
directory (E:\Program Files\Winhttrack\ :) )