I'm installing a hard wired XM Sky Fi unit in our '04 Treg (V8, PPS+everything else imaginable). The probem is that since there is no accessory position on the ignition, I can't locate a fuse or wire to power the XM unit when the ignition is "off" or the key isn't in the "on" position. It would be nice to be able to listen to commercial free music white washing and waxing, etc. without wasting gas or draining the battery. Ideally, I'd like to have the XM to get power when I insert the ignition key and power off when I remove the key. Thanks in advance for the responses!