well i have put the electric window motors from another micra in my manual doors and the mounting screws are the same
i think they will be a straight swap
the only difference betweeen the manual and the electric mechanism is that the manual have a that gold bit of metal sticking out which the window winder attaches to.
so just cheack to make sure your new door has a hole for this (although it probably will) (and if it doesnt you could just drill it)
i hope some of this made sense but its still early for me