You need to press the music button to enable all cheats.
If you press on a bunch of codes and nothing happens, the cheats are disabled.
At the NitePR menu, there is a red text saying that your cheats are disabled.
Go back to the game, and click the music (note) button then go back to nitepr.
The text that was red should now be green, and you should be able to hack now!
good luck =p

----Added 4/8/2009 at 6:47 PM----
Quote Originally Posted by onlyboi View Post
This might sound like a noobish question, but what is ghost codes? what do they do? Please reply Thanks!

They Make You Invisible lol =p