Unlike Illustrator, Flash Catalyst only supports one artboard. If your design requires this change, then you are either going to have to create separate Catalyst projects, or calculate the maximum artboard for the project, then find a way to fill in the unused portions of the artboard that is not used by each page.
Hope this helps.
Owh that's a bummer... but ok, I'll have to figure out a way to work with it.
Thanx for your help!