Please do not necropost. If you need additional support, please check the FAQ (here's the relevant post for stuttering - viewtopic.php?f=6&t=3507&start=30#p42818) and create a new thread if needed.
Note: for your specific question, I'd start with the PS3's manual first. Specifically look at "Ethernet Operation Mode" section of http://manuals.playstation.net/document ... vance.html
Or you can look at my post already in this thread - viewtopic.php?f=6&t=720&start=10#p4270