KC easy is the best client now for the fastrack network (Kazaa)and you can modify the ini. file so you can leach off fastrack and share on the gnuttella and open FT networks if you wish .Its also open source and no spyware ,adware to worry about and it seems to be fast on downloads and searches if you wish .Randomnut the old developer of Kazaalite has recomended this and may even be working on the project.
http://www.kceasy.com/