Hello Robin,
Let me know if you have tackled this yet and I can step you through the hang ups. I have the same model keyless entry system in my 760.

The tricky part was figuring out were to hook the light flash function to. Also the honk feature will require an addtional relay (Radio Shack has them for 6 bucks). I think the horn is sort of annoying and I skipped it esp. since I could never figure out where the wire was :)

One of the problems I encountered was that if the drivers door is open you can't lock the doors, because the drivers door is the master door lock. You can disconnect the drivers master door lock feature and then figure out all the correct wiring without the doors not locking hassles(just follow the wire from the lock to were all the wires are for window functinos are). I tied the drivers door lock actuator into the drivers rear door lock wires and then the keyless system into the same rear drivers side door lock wires that run under the door(I found the wires by the fuse box and the where blue and white with red stripes, just use the test probe to make sure, ie probe the wire actuate the lock and wait for the probe light to flash). The set-up was way simpler on the 240. If you need me to elaborate just drop me a line.

charles_thayer@ncsu.edu

PS Finally got the 760 back on the road!!!