There's a Pandora's Box 3.x Version floating around somewhere. I would first try to use that one.
I tried the Pandoras Box 3.x too but I couldnt get it working with Box Server.. I just need Box Server with RunUO 2.0, doesnt matter which Pandoras Box, 2.x or 3.x, as long as I can get Box Server working. Does anybody know how to make any Pandoras Box Server work with RunUO 2.0?