> So in which order do I have to complete the data: get 
> URL, change proxy data, submit, coming back to httrack, 
> capture...?
- Go to the login page using your browser
- Copy/paste the URL and choose "add url"/"capture url" in 
httrack
- Change the proxy settings
- Click "login", you should see the httrack message
- Start the mirror

> Or, simply, does NY Times make unable the capture?
Possible. Some sites are very difficult (in certain cases, 
this is made on purpose) to mirror.