Hi again
Not sure--see
http://www.weedshare.com/ for ways in which some files can be listened to before you are asked to pay.
Enjoy.
You might want to try starting with the specialized files that are authorized for free and legal filesharing, like the ones on
http://www.magnetmix.com/audio2.shtml (there's video too) before you try all the ones in the wild. That will give you a chance to get the feel of how the downloading and sharing proceeds.
Feel free to delete the files, and it might be a good idea (if you use Windows) to make sure your virus-checking software is working properly too.
Cheers again