The Flash Gallery Block provides Flash based image gallery. The gallery can be displayed in-page or in a pop-up window and can display multiple galleries in one block.
Includes the source FLA files for Flash so you can do what you want with it.
See the Flash Gallery in action at OXYLUS Flash.
NOTE: This is a free add-on from the core team, and while we expect and hope it works great for you - it does NOT come with included support.