I agree with Mortal's assessment here.
Your best bet, I think, would be to try and find a piece of software that can combine your multiple 'physical' controllers into one 'logical' controller.
(I think those are the right terms)
* 'Xpadder' might be able to do it, but I think that will only give you digital controls (button presses) at the end, and no analog (wheel/joystick) movement.
* There is something out there called 'PPJoy' - or something along those lines - that
might work as well, but I think people had issues with it not working on Windows 7 and later.
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