Hacking my son's racecar - Radio Shack

Took my son's racecar apart - one that he lost interest in ( I hope) to see if it might work for bot body. Removed circuit board and am left with what appears to be a stepper motor on steering ( 8 wires) and motor driving rear wheels. The thing has a very neat suspension system. It'll make a great body if I can hack into it .. tow big challenges;

1) Decode the 8 wires to stepper - how to interface to the OOBoard
2) Find H-Bridge on the old board - remove it along with the power transistors ..

It's amazing how many projects I've got running in parallel .. well .. guess I'll put this on the side .. not ready for the stepper challenge yet ..