I'm thinking about getting a sunroof in my 2000 3-door and a wise choice would be a factory one.

Maybe someone knows what are the differences in the roof itself and what would I have to to to make it fit. And how is it wired?

I can get cheap a whole roof from another 3-door, but I'm wondering how much work would it be to put sunroof in and is it even possible...

 

Not easy as its not just a simple hole, its kinda pressed into the roof, so your only real option would be to change the roof skins over, shich shouldn't be a huge job if you're handy with a welder!