how to Customize template

Today i began to use gallery and I see it ti be very nice and customizable. My project at hand now demands some tricks which I'll need a gallery efficient user expert advise for
Need to embed flash(.swf) file on the home page

To better understand this please kindly visit www.caxtonalile.com When the page opens and the flash(.swf) banner is clicked it brings two images. The upper on I want it to be editable at from the admin panel and the lower one when clicked should open up in a frame.
How do I go about this please? Thanks. God bless