Well there is a way to do it. You say that your rear view lights flash when you arm it? Well you can find the wire that is being powered that flashes that light, and you can use a relay to really do what ever you want, eg..parking lights or horn.. You would also have to use a diode to isolate that wire so whenever you turn on the lights on the rearview(only if you can do that), it doesn't turn on the parking lights or the horn or whichever you choose to do. Let me know, and i can come up with a wiring diagram for the relay and what exactly you want to use(parking lights or horn). I never realy noticed before, but i don't believe my RS has those lights on my rearview, otherwise I could let you know what color the wire is. Let me know whats up.

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)