Welp, i've bought 2 pieces the "Interlink Micromodule pointing device" $9.90 ps2/serial,from www.meci.com, got a great service (honestly)
and it works well, its pretty cool i must add, im gonna mount it near the handbrakes...
you can check it out in http://xmen4u.tripod.com/
you get with it drivers, manual and diagrams of the pcb... (in the manual) very detailed...seems theres another model which isnt a joystick alike rather than a keypad like... like in gamegear style... but full 360 deg... not sure about that but the one i got rocks.. very glad with it... and for $9.90 who wont be...
Cheers, yours, X. The link: http://xmen4u.tripod.com/ Click below
XMen's CarPC Website