Few technical questions, mostly interior oriented Options

[conus00]

Hi all,
I'm currently in the process of redoing my interior and a few questions came up. I bet you guys know the answers:
1. Will the carpet from hatchback fit coupe?
2. Will the back seat from hatchback fit coupe?
3. Are the A pillars interchangeable between hatchback and coupe?
4. Are all the dash trim pieces interchangeable (like speedo trim, radio bezel, shifter trim, glove box, driver and passenger kick panels, etc.)?
5. Will the complete doors (hinges, latch, door panels) from hatchback fit coupe?
6. How do I get rid off red dashboard seat belt indicator if I install aftermarket seats and harness? If I remove seats and keep the piggytails from the stock one can I just solder them together to create loop or am I just better off pulling out the dashboard bulb?

Thanks for your time to answer.