The remote codes will not match any other remote - the manufacturer ID is unique.

The car player supports Kenwood automotive remotes, but that's purely for historical reasons (empeg used to ship a Kenwood remote before manufacturing a custom part).

I daresay it would be possible to hack the player to support other remotes, though. This has been done by enthusiastic owners of the car player, and a similar process could work with the Receiver (AFAIK).

Rob