MMCS removal questions

[dynafit]

Hey,

I have a few questions I need to know about the MMCS (multi communication system) in my Lancer Evolution 8 2003 model.
Firstly, its all in Japanese, and I am Australian - in Australia. The buttons, the screen, the gps info everything.
What I want to know is:

1)Can the MMCS display (screen) be removed and replaced with an aftermarket head unit from any audio store, and the air conditioner still work? obviously it wont display the air con temps/flow directions on the new unit just as long as it still turns on and cools the car.

2)Can you disconnect the battery without the MMCS breaking and requiring a new CD to reinstall everything? (there are no Australian/English versions of the CD's and the gps is hardcoded into japan, so reprogramming is not an option). This point ties in with the first, as new sound system would be the reason for disconnecting the battery. Also for future reference if the MMCS was to stay, and new parts like fuel pump or ecu was to be installed and battery disconnected I don't want my sound system stuffed up for good and have to replace MMCS anyway.

3)Can you install a second head unit (single din) somewhere else in the car and have them both working at the same time?

4)Can you remove the MMCS screen, and the dash fascia, and replace with a "stock" (read: mitsubishi australia) replacement fascia, then install a single din head unit. This point ties in with the first as i want the air conditioning to work.

5)Can you plug your phone into the RCA ports (red white yellow) and play music through MMCS? My unit does not read CD's of any kind. Normal, mp3, data, dvd, nothing.

I have read a lot and cannot find a real answer to my problems, so I am creating a thread myself. I have called Mitsubishi Aus and they don't know -.- Any and all help is much appreciated.

Regards,
Lachlan