PS3 is pretty easy mate. There should be network settings that you set up when you first install your PS3. If you haven't done it yet have a scroll through the menu's and see.
Because Tiger Woods and NBA are published by EA you must create an EA account to play online, its a stupid hoop you must jump through that wastes our time and just gives EA the ability to say "hey we have xxx amount of players playing this online, should we make another one".
Basically go onto the EA sports website and create an account, then use those details on your PS3 when prompt.