You may as well get a unit out of a Toyota, the difference between a standard set-up and a MMCS system is worlds away, you need 3 componants to get it working and miles of cable that is unique to the version where you bought your new unit from. The only chance of getting it to work is to strip out everything that joins up with your unit, from the car you got it out of, if one bit is missing it will never work.
send some pictures of the unit you have and what was originally in your car, front and rear to
vrongav@talktalk.net, also you will need the software to boot it, if you get it working.
Regards
Gavin