I have some more tips regarding this.
I used this Relocation kit:
https://www.amazon.com/Metra-95-7017B-Double-2002-2007-Mitsubishi/dp/B00WAHKT0W
This ISO to Mitsubishi wire harness, then you don't need to cut any wires
http://www.ebay.com/itm/191522544916
Radio:
https://www.amazon.com/Eonon-GA2154-Multimedia-Bluetooth-Navigation/dp/B01M5FR43M/ref=sr_1_1?ie=UTF8&qid=1480527041&sr=8-1&keywords=eonon+ga2154
I had to connect Illumination wires of ISO harness and radio harness manually by soldering and covering with heat shrink (Rs:50 per 1m at Pettah)
Also I had to connect the ground wire of radio harness to break in wire in the radio to by pass video playback only when vehicle is stopped (specific to radio)
There is a place to keep mic in the original car design in the dash panel. just below the tachometer. (like a place to keep speaker, with few opening lines)
You can put and paste (GPS antenna with magnet will get simply attached) the GPS antenna in the cylindrical metal tube inside the radio opening
I routed USB cabled of the radio to the cabin hole to use USB devices.
The tricky part of the modification was relocating the AC panel, I have seen that many people are trying to unplug AC cables at the panel but it is hard and there is a possibility of breaking parts, but you can easily unplug AC cables above the pedals with just a flat screw driver.
Unplug AC cables below dashboard just above the clutch in manual cars as below:
Then no need to remove AC cables in the panel :
Used ISO to MMC wire harness, no more wire cutting:
After everything finished: