iOS full/lite version using multiple windows

Question

I have two targets in my Xcode 4.3 project. Each target has its own X-info.plist file. I would like to have two windows (MainWindow.xib), one for the full app and one for the Lite version. I set the Main Interface for each target and also Main nib file base name in the X-info.plist but it's not working. What did I miss? Thx