Mark, what the IC displays is part of its software. I don't think you could get the FE display in your IC if it came from the factory with the nav system. Unless perhaps you swapped out the IC with one from a non-nav FEH or had the IC computer re-flashed. Then you would lose your oil change monitor, though.

The wiring harness needed for the swap connects the IC to the MS-CAN/ACP module, which then goes to the nav radio.