Hey Nacho,
I gave you that link just cos so many zip files are junk or contain malware. Sure there are some legit ones but you just have to be SO careful when downloading them
Have a look at this thread, LOTR gives some instructions:
http://www.gnutellaforums.com/showth...tall+zip+files
Make sure you're careful. Scan before opening is a good rule & might save you from a heap of probs