> A CFM website offers .pdf downloads. The problem is that 
> the download file is named something 
> like "download_get_file8d04.html" instead having a ".pdf" 
> extension. The file actually does have PDF content and if 
> the extension is manually renamed to ".pdf" it can be 
> properly opened by Acrobat.

Err, unfortunately this can not be handled by httrack, 
which takes by default html files as html files.. the only 
way would be to programmatically wrap the naming callback 
of the engine, and change on-the-fly its name ..