Destine Designs have made a BF2 theme public, actually since july but it is really nice and thought you might like to put it to the top of your list to port it since we all like their designs .
HERE is a demo of it and HERE is the download area for it, one for PHP-Nuke and one for Platinum.
I did the whole portal of it by replacing images and changing sizes in the tpl files of the HL2 theme since that's by them I thought it could be easy to adapt BF2 files, but after the portal I have no chance lol couldn't even do the blocks right.