Wonder if any one knows the diffrences between 180 and 270 / 90, regarding color support.

As I have a broken screen, and no screen available in the market..., I came with the idea of buying Treo90 as spare parts for the 180.
(Fix the unit + Upgrade into color in apx. 200$)

Sounds great in theory, but is it really possible ?

For instance:
1. Are color screen unit connectors same as black&white ?
(Mind that Treo scrren units come as combination of drivers & LCD packed together)
2. Is there a OS SW diffrence required to support color screen which is not available in 180 ?
3. How does the unit inform the OS if it's color screen or not ?

Any one have the ability to compare insides of the 2 units ?