If you want serious info about doing this swap PM a bloke called Simon, I think his user name is Simon-R32, he put an RB25det neo in his R32 and he really helped me when I was looking at everything I'd need for the conversion. In the end the hardest thing wasn't the wiring (he can tell you how to get by pretty easily) but there were a lot of mechanical things that needed changing if you wanted to run the RB25 gearbox with it, and trust me, you do.
There are quite a lot of videos of his car on YouTube if you search RB25 R32. In the videos it's a green colour from memory