I guess my post wasn't clear -- my Xbox is not running Linux; it's softmodded and running UnrealX. My laptop, which I use to run the OpenXDK, is running Linux. The generated XBEs are not running properly (as outlined in my original post), so I'd like a set of known working XBEs compiled by someone with a working OpenXDK to compare against (using a disassembler). I am under the impression that it's legal for someone with a working OpenXDK to post these XBEs since they were generated with OpenXDK and the whole point of OpenXDK is to make that possible.
Edit #1: Oh, I missed the XBE ready to run note at the end of your post. That should help (although I'd really like very simple demos, without having to install pbKit and add more complexity)!
Edit #2: The pbkit stuff you link to doesn't include actual XBEs. Source isn't going to help me, since I think that the problem is my OpenXDK build not generating correct XBEs.