>> 5) Is it possible to have WinHTTrack download data
>> from some sites in terms of .mht files and others in
>> terms of .html and .htm files? 
> 
> Httrack doesn't know of mht.

It actually does. :-)

Use the option -%M and HTTrack will generate an additional file called
index.mht in the root of the destination folder! 


- Bo