The Fighting Engine
Open BoR has been enhanced.
It now uses the upper memory on the gp2x.
Download: Open BoR
Sorry, the upper memory support is being removed because it breaks the newer OpenBOR builds.

See this post:
http://www.lavalit.com/index.php?topic=963.msg13631#msg13631
I'd recommend a GP2X coder to them, but don't want to volunteer anyone, and don't have any idea who'd help out on something like this.