Right dude, a couple quesions:

[list=1][*]What OS are you running?[*]Is VB compatible with that OS?...maybe you need an upgrade.[*]Was the VB you got warez, or burnt? Check to see if you have the actual Installation CD wit you.[*]What type of errors occur when running VB? Are they "Runtime" errors?[*]Does VB completely install, but not work. Or is it that it just won't install period.[/list=1]

Because it could be that your OS (Operating System) might not be compatible with VB6, and you'll have to download a patch or upgrade for either your OS or VB6. Also, warez files that are this large tend to usually be nice (from the good sites at least ), yet others infect virii into thier cracked supply. You could have gotten the bad pick of the crop . The best thing to do (especially if your friend gave it to you) is just run over to his/her house and borrow the CD for an hour or two. Install it from there and everything should be fine.
Another problem that might be occuring could be runtime errors. This simply means that you must go HERE and search for the Runtime you need. Now remember that this does not only happen for runtime errors, there are many numerous errors that call for a missing file that is needed.

I hope this solves your problem somewhat. Just play around with it, call your friend over for help, maybe he can help you more. Good luck.