I haven't dissembled the head unit, but from what I read on here about the 05's, since my RF unit is already pre-wired for SAT, I can use the PAC AAI-NIS box to run two aux inputs from the SAT plug on the back of the HU.

I figured I would have to solder to the back of the power socket for a permanent install, most likely the one that is only active when the car is on. Is there a limit on the power draw for one socket? the reason I ask is that I have a TomTom GPS unit already plugged in to that same outlet using it's car adaptor (nothing hardwired).