Timeline reset in a FLa?

Hi
Im new to flash so this might be newbie question. Im developing a game that uses the same framework over and over again, the only thing that changes are the images and text. In flash, the elements are separately laid out on the timeline. My app is growing very large and my timeline is getting out of control. So far the background image can change 60 times and I'm 1/3 of the way done. Is there a way to do a timeline reset, where all elements on the time line end, and the timeline starts over fresh, all in the same FLa file??

This would allow joining separate FLa files which would also be a big help.

Is there a flash plugin to help with this kind of development? Thanks