i asked a similar question, actually not too long ago. if you ever used kazaa with windows i would really use kazaa, i think its one of the easiest p2p's out there. you have to run it under wine, which always you to run windows apps in linux! if u want to stick with the one you just installed, read the read me, those are very helpful. but how to run kazaa can be found HERE
and to find out more about wine and to download it go HERE
.... hopes this helps!