first, you posted in the wrong forum
second, a simple search would yield hundreds of theads with that exact same question, and answers
but i'll be nice
yes, you can, and it's very easy. Just get your bios to point to xbmc's xbe file and that's it
or, just rename the xbe to the same one that loads now (evox.xbe, default.xbe) and place it in the same directory with a modifed xml file