touchscreen

i have the regular 6 disc changer in my 08 and am thinking about changing over to the navigation/sirius head unit. will the wiring be the same and just be plug and play? i dont want to change alot out.

Has anyone tried to or know of a way to mount a SCT touchscreen tuner in the "mini-glovebox" :dunno: (the storage comp just below the aux switches and trailer brake). I saw that there was a company making these types of mounts for the 6.4s that replaces the fold down cup holders. But havent...