Anyone familiar with the satellite prep option? I do not have it but have been reading up from the e90 site about a DIY. Anyone successfully done a satellite prep DIY on an E60 to integrate into idrive? Right off the bat all bmw install docs mention 2 MOST blocks in the trunk. I only have the bottom one (but i have open inputs and outputs). Anyone with some experience out there? Trying to figure out if i can make this work.