scrap the changer. scrap the deck. that's where i'd start.
get an ipod compat. deck, and buy a small ipod. in the place of the changer put the cubby (rodeo/trooper part). or, in place of the changer add some scan gauge products?
Good setups (IMO) always start with a good head unit.
I can't speak of 2006 alpine/eclipse models - I only have an 05 (Alpine CDA-9835). Anybody recently purch. 06 models from these manuf?
BTW: MSH - any progress on the system?
-biju.