> I am having a problem with catching a website by 
> HTTrack .In fact ,I thought it could copy the website in 
> one hour maximum,but It's now six hours that HTTrack is 
> copying the website .

Wow, quite long. 
- try the latest (beta-9) release
- ensure that Options/MIME type is filled if necessary

> Is there a way to stop the process a maintain the content 
> already copied without deleting all the files taken ?
Yes, just click "cancel"

> 2.Where can I mention that the new project (website that 
I 
> am about to copy)require 'name' and 'password' in 
HTTrack ?
Just go in 'Add URL' and fill in the proxy and password 
fields