If you try this it may work, but I would be certain the items you get are from the same model in respect to engine (Limited or Base vice SRT6) and the same transmission ( auto or manual) as the car you are repairing. I would also get the keys, the ignition switch and the drivers door lock so that you have the complete system from the donor car. I'm not sure that your keys would synchronize with a completely different PCM and SKREEM, what you are calling the immo module.
Good Luck!