if u want a good explnation of how the actual mecanics of file shareing work go to howstuffworks.com and serch for "fileshare" that site has tons of info on everything. your obviousley a noob so just some pointers , STAY AWAY FROM KAZAA ,morphious, bearshare and lots of other halfassed p2p programs. and be verry carful of scams too , they can be verry decieving. limewire ,ares and emule are the onley good no BS p2p programs that i know of. and by BS i meen viruses ,spyware ,trogans and worms and advertisments.