It was a pain in the ass with the worst directions in the world. I had no idea that the Lock and Unlock Input was actually the input end of the relay and that the main power only drove the relays, not the hot wire thru the relay.
If you're trying to do the same thing, let me know. I can probably give you a few pointers. Now I won't have to deal with frozen locks!
That said, I have a spare unit lying around and if your E36 is wired for Keyless but doesn't have one, I'lll gladly provide the unit and install it for 70 bucks! Comes with 2 remotes
I haven't figured out how to get the parking light to flash yet though...