I know people have told you this before but I'm going to tell you again
Zips are not to be trusted (especially those less than 1000KB in size)! So many people have found themselves with a little virus surprise. Please read this sticky, just so you're informed
http://www.gnutellaforums.com/showth...threadid=41432

If you're determined to install these, there might be some info here
http://www.gnutellaforums.com/showth...open+zip+files

Scan any file you download before opening.

You'll find that most games you download won't run - they'll either need a CD or activation code.