Hmmm sounds like you have been scammed. The basic version of LimeWire is free. See this link. http://www.gnutellaforums.com/showth...threadid=28751


There is not a way to preview the song before it is downloaded.
However you can preview the song once it has started to download. Yoy need to highlight the downloading song, and click the play buttom (on the player) to listen to it.