[goser]

Yeah i've never found an answer about the crossover...it must be there somewhere, but where?

I abandoned my rear speakers and ran four new lines to the dash and front doors--Infinity 6.5" in the doors and 4x6 plates in the dash. I had to cut off one of the mounts on the dash cover to account for the extra thickness of the plate but it all fits nice and snug now. The finishing touch is to get a deck with a crossover (what Pioneer calles "network mode") so you can send your highs to the plates in the dash and the mids to the doors.