You can get a cable that is xbox->PC USB connector on the ends. And there are drivers at codeunderground.com. Not sure if it would work with the wheel, but I know the xbox gamepad works on PC that way (it thinks it's just a fancy joysick).
Nice finish on your cab, BTW.
EDIT:
I just found and bought the xbox-usb connector and downloaded the drivers, so we'll find out in a week or two (international shipping on the cable) how it works. Thanks for the lead...
ORIGINAL:
The wheel and pedals are just glorified analog joysticks as you mentioned, so if it works with the game pads, I'd imageine that it'll work with the wheel.
I have a wheel and pedals for the PC, but they are old and I don't want to have to switch 2 different wheels in and out depending on the system.
As far as multiple pictures, you have to upload your pictures to a web host and then use the standard ubb style image tags. Or just click the little picture icon in the tags list and put the link to the picture in between the tags.