What all will I need for Xbox linux?

I'm planning on putting linux on a xbox.What type of mod chip do I need?And how do I flash the bios to it?

Take a look at these two links, basically you don't have to mod it, that's just one possibility:

http://www.xbox-linux.org/wiki/Getting_Started#22

http://gentoo-wiki.com/Gentoo_for_Xbox