Limewire will change your whole web experience. the basic limewire is free and excellent- to be honest limewire pro isn't much different and isn't worth the extra expense
the basic one is free and you can find almost everything - music, films, software, games - the lot
make sure your computer has a good virus checker though because there a lots of false programs (normally MOV files and ZIP files) but virus check EVERYTHING you download -music is ok though
FREE FREE FREE forever!
and never download "sponsered result" files or any file that has a WWW.something in the name