Wasnt directed at you personally.
Chances are, your 2.0 box will be 02J so you would probably be alright in terms of transmission as you can use your 2.0 setup. You would need a new clutch to cope with 1.8T power, but a 2.0 clutch would more than likely bolt onto the 1.8T block, but soon die from the power.
Looms you will need the engine loom and the looms that go to the ECU. Brakes would need upgrade and full 1.8T exhaust or something 2.25" bigger bore.