I have 2 8v GTi's at the mo and I am wanting to do an engine swap
The shell I want to use is a 96 (N) and has an AGG engine with seimens ECU, this engine has done just short of 200,000 miles and the gearbox is fooooked!!!
I want to keep the after market Toad alarm with the keys (I have 2 sets for this car)
The donor is a 93 (L) with a 2E engine and Bosch ECU, this engine has done 100,000 and runs perfectly, its also a lot swifter than the AGG.
My main questions are -
1. can I just stick the 2E engine in and use my existing seimens ECU, keys and alarm???
2. If not, how difficult is it to get the donor ECU programmed to my Keys and alarm???
2a. Can I do the programming myself, I have all the vag-com, vag-tacho software, just need to buy the cable and someone to tell me how to do it

3.Are the wiring looms the same on each engine??
Thanks in advance.