On the remote entry thing, you can press unlock twice, and it will unlock everything.
Also, if I put the key in the driver's side, and turn it clockwise, it unlocks the drive side, and if I turn it clockwise again within 3 seconds, it unlocks everything.
Not sure if you would have the same setup, but it's worth a shot!
(I have an '04 GTS, by the way)
Oh yeah, and the trunk light is on the right wall of the trunk - looks much like the dome light in the cockpit.