Modding an Xbox eh? There is a lot to read, you have to make yourself comfortable with knowledge gathered from all of this. I spent hours reading about modding my Dreamcast and playing certain games on it. I still haven't achieved my goal lol. Like everybody else said, Google is your prime resource. I suggest contacting someone with good soldering skills and probably someone who knows a lot about modding and emulators.
I know how to play games on my computer, but modding isn't my cup of tea.
You know what would be cool?...If you took fine sandpaper to the casing of the Xbox and had it airbrushed white.
Pimpin' ain't easy.