> > However, the offline browsing is extremely slow.  

By the way, you may also want to use the MIME type 
matching : that is, telling httrack that php 
is 'text/html' (see in options, or, using the 
commandline: --assume php,php3=text/html)
This will speed up the download of php files (the 
engine won't have to test the MIME type first)