You can do it, But your other windows may not work. Because main switch is in old door that you would be removing. If you are going to switch regulators from one door to the other, it may or may not work because you may have to make a hole in door frame for your harness to go through, and the inside door frame may be slightly different. If you just need to pass inspection and don't care whether your other windows work, then by all means switch the doors. After you pass inspection, then you can mess around trying to move regulators around, ONLY remove what you have to ,to get the door off, you'll need the other for comparison. GOOD LUCK