The PureMVC Framework Code at the Speed of Thought

I have several problems  about modules(moduleloader)  in PureMVC as follows:
1.If I put the [startup] method in the [creationComplete] event ,I can't obtain the module object at the background when registering moduleMediators.
2.When putting the [startup] method in the [module ready] event,I can obtain the module object, but is it suitbale that once I change the module,call the [startup]?

Can anyone show me a sample about how to use moduleloader when registering moduleMediators

Thanks a lot .Looking foward to any of your replies.

Best Wishes from a Chinese friend:)