Transition between external swf's

Hi,

i need to take my project to the next level.

What i wish to create is a transition effect between several swf’s in a main movie.

It’s kinda like a foto scroller with only left and right navigation, each foto being a seperate swf. The problem i am faced with is how to create a mask or AS it so it appears as at this example…

http://www.huidilauhoff.com/

Reason for wanting it to be single swf’s is that every ‘page’ needs to have it’s own elements, such as selectable buttons, tweens and whatso that only appear on that particular page.

Any ideas how to embark on this ‘journey’ would be highly appreciated.

thanks a lot in advance!

Coach :h: