A word of advice...Be really careful with downloading programs and games...
You would be really lucky to come across the genuine thing as they are full of viruses...Take a look at this thread...
http://www.gnutellaforums.com/showthread.php?t=41432
Also, most of the time there outdated and have no registration key..
You can also check files with Bitzi to see if they are genuine...
This thread will explain how to use it...
http://www.gnutellaforums.com/showthread.php?t=37676