Hey man, sounds like a great project. Make sure you post up pics. Are you a member on G6performance.com? Thats the main "G6 specific forum", so I'm assuming thats what you're talking about.
Make a post over there as you work on this and pics pics pics! If you've been reading the site, you know how helpful people are on there so if you have any issues we can def get it fixed.
I'd love to put together a carputer so hopefully you get one working and I can rip you off haha!
Good luck and be sure to get info on G6P. Drop me a line over there...same name scuba264.