To file share you will need some management software like
BitComet all though lots are availible.
You then need links to files from somewhere like
Pirate Bay.
File sharing can be a very bad thing If you are ripping off up and coming musicians etc , it can though also be a good method of transferring large files.
The movie industry may well use this method to distribute it goods legally soon enough, hence the demise of your local blockbuster.
Oh and you can now get your heroes,weeds,lost etc direct fron itunes. £1.99 no discs, no packaging , no transport, no waste.