Anyone know how difficult it would be to carve up a spare Kenwood KCA-R6A credit card remote to serve as a hard-wired keypad? I don't know anything about the internals of the remote, but I'm wondering if I could just connect to a few contacts inside and be able to process the key presses without dealing with powering it or interpreting the infrared signal. It's just a matrix of microswitches like any other keypad, right?