Here. Or if you REALLY want to just add a line to your evox.ini you could add this under your menu and just choose it
CODE
Item "XBMC","f:\apps\XBMC\default.xbe"
QUOTE(1hotjob @ Oct 1 2006, 01:59 PM)

If you add that line to be the first item in evox, then when the Xbox boots, just press A and it will launch XBMC.
Yea I know, but i can just put that .xbe and it does it for me, it was in my evox.ini it was even my the first one my list, but i just didn't want to press anything. but also din't want to mess with the bios. I know how to add things to my ini file, but with always using XBMC more then playing games I needed to bypass evox