You most likely couldn't pull a single page of that into a Contentpane.

Remember, Flash only supports certain html tags and very little else. The forums would not load. From what I see visiting the link no page there would as they stand.

At best you can use the database structure that exists now and interface a Flash frontend to it but you would also be required to hand code the server side backends (normally PHP or other method) to tap into the MySQL tables. Can it be done? Sure. Is it going to be an easy ride? No way.

It definitely would be a labor of love