I'm new to Xcode and Interface Builder. I'm using a PPC computer so I'm stuck in Leopard. Which means I'm using Xcode 3.1.4.

The problem I'm running into is: I can't find the AppController class in Interface Builder. All the newer tutorials I find online say to find it in the library. I type AppController in the search pane and nothing come up. Some say to click on classes and select it. But where is classes that I click on? The buttons at the top of my library only say "media" and "object". Is there a step I'm missing?