All you have to do is remove the radio, and cut the remote antenae lead and wire that to your switch. It's that simple.
Which wire it is for you, I don't know. If you have a stock head unit you can find the wiring code in a Helms manual, or you can go to your nearest dealer and they can photo copy the wire codes for you. I don't know if they'll charge you for it or not, but they've never charged me.