I'm not sure if you already did it this way:
Add your door shapes as regular brushes off to the side somewhere, properly texture and align, then for each intersect each piece, and add your mover in the proper position.
You cannot change the texturing of a mover brush, by making it with a normal brush and intersecting, the mover brush retains the texture properties of the original brush.
You can then delete the extra brushes, or like most do, leave them in a subtracted cube not part of the map, so that you can always just intersect again to get more doors.