According to this Wikipedia page Xbox is:
...so I believe that Kos can "easily" run (even better/faster than Linux) on it.a legacy-free PC by Microsoft that consists of an Intel Celeron 733 MHz CPU, an nVidia GeForce 3MX, 64 MB of RAM, a 8/10 GB hard disk, a DVD drive and 10/100 Ethernet.
Does anyone tried this before ?
Thanks in advice for any hint/help you can provide.
Dunno if can help in any way, but here's the main related resource @ SF.net:
http://sourceforge.net/projects/xbox-linux/