There are only two in the emulators for the XBOX
- Xeon
-Cxbx (I think you mean this one)
Xeon
- A true emulator but can play only HALO thats it. More here:
*www.emulator-zone.com/doc.php/xbox/xeon.html
CxBx
- this may not actually be an emulator to some people but everyone considers it one. Cxbx's goal is to convert a game from an Xbox executable to a native Windows executable.More here:
*www.emulator-zone.com/doc.php/xbox/cxbx.html
I reason as to why they stopped working on XBOX emulators is basically because, nowadays the XBOX is used for so much more than just for playing games or watching DVD's. Take a modded XBOX and you can load up a lot of software and convert it your home theatre system. I know cos I have done exactly the same