Aircondition, airbag, immobilizer not working, after engine swap Options

[Iceman22]

Hi.
I did a engine swap a while ago, from 7A-FE (euro spec) to 3S-GE (JDM).
The st202 donor car with the 3sge, did not have airbag, abs, immobilizer, but mine car have, and it worked before the swap.
Also the aircondtion does not seem to work, because the engine idling is not changing when turning it on. There is no gas left but I know on other cars that the engine is working harder even though there is no gas left. There is a green light though on the AC button when turning it on.
The ABS seems to work, because the ABS light is working on the dasboard, but not airbag.

I changed the engine and the wire harnesses, and all the plugs that goes inside the car was fitting on my car.
So my question is, why don't all this functions work?
Is it the ECU that is not supporting all the functions, the problem ?

This post has been edited by Iceman22: Nov 4, 2010 - 1:22 PM