Humm if you didn't like the apps I recommended you in your previous thread you should really not choose a Gnutella client. Gnutella is very complex. Maybe you should try to find the original source of the Gnutella 0.56 client that was released in 2000... You won't find simplier code.
I have a suggestion, check out Tiny P2P it's only 15 lines of code and it is open source!!! The world's samllest P2P program!
http://www.freedom-to-tinker.com/tinyp2p.html 