I've done lots of searches in the forums and on but still can't find any details of how to connect a head unit I've got to a usb joypad.
Is there anyone out there who can help?
I haven't seen a headunit yet with a USB port. That means you'll have to adapt your USB game controller to output to your headunit, which involved interpreting the existing controls and getting the joypad to do that.
Good luck, but I'd think the time/effort/expense for such a feat wouldn't be worth it...
Have you looked in the FAQ yet?
How about the Wiki?
Under normal circumstances, a signature would go here.
I've figured out how to connect the buttons on the front of a car stereo to a joypad to control winamp and windows(using girder). My next trick will be to connect a usb and normal joypad at the same time, this should give at least 22 buttons!
I've finally got the headunit connected to the car pc. Managed to wire up a usb joypad to the buttons on the headunit.
So at last I have a way of controlling RR without the need for a screen or nearly crashing into other cars when trying to find the key to skip tracks!!!
Next on the long list is to install Girder to control other functions and get a screen in again.