> Hi.. I just want only to ask if i can use HTTrack as a 
> proxy server?
Uhu no.. this is beyond the scope of this software!

You can use the excellent proxy cache Squid, however, which 
is free (software) too:

Squid:
<http://www.squid-cache.org/>

(The Windows version is available through Cygwin, at 
<http://cygwin.com/>)