Bad news -- it sounds like you've been caught out by some savvy scammers. The site you have given money to is part of a group of scam sites that seeks to charge for a service that is otherwise free.
Alright, not looking for a lecture on ethics or P2P in general, but I was curious if a program existed in linux that I could ssh in and add things to the download cue. I use gtk-gnutella right now and ...