2000 Volkswagen Jetta possible shortage or bad ground?

I have neglected this problem for a while but finally decided to ask. My dome light selector switch became loose and the light itself shorted out. But along with it went the power windows, sunroof, and ability to use my keychain remote to unlock/lock the car. When I replace the fuses they blow instantly. So all affected areas are still out so im trying to figure out without tearing apart my interior what one(maybe two parts would affect all those things. Any ideas on what it could be or how extensive the repairs might be?Is it something id need a mechanic to fix?