I know the type of door you're on about I'm in the middle of doing up a door to replace my NSF door, they're dead easy to get off and strip down (to replace the locks, if you want).
Basically follow the advice in the thread posted below, but unscrew the two metal hinges from the chassis (not the door, leave the hinges on the door).
IIRC there's only two big hinges that need unscrewing, and the electrics bit which needs turning anti clockwise to undo.
Wind the window down halfway before you take the door off, not only is it easier to then carry the door, but you can access the retaining bolts to then get the window out if you need later.
It is a two man job though, one to hold the door and the other to unscrew, those doors, with glass, are heavy.
Reply here if you want advice on stripping the door down to a shell to get the electrics out.
