Replacing power window motor / regulator is easy.
2 weeks ago my driver side power window stopped working. The motor would spin but not move the glass. I bought a new regulator/motor on e-bay for $126 from San Bernadino Mitsu. I was expecting to have a hard time installing it but it couldn't have been easier. One thing that helped me was that the window was taped in the up position. This gave easy access to the regulator and motor. Anyone on this board can do this repair themselves. Here are the steps I followed.
1. Remove door panel - remove 5 screws and pull on panel
2. Cut plastic that covers door inards in such a way that you can retape it back.
3. Raise window glass to up position if it is not up and tape glass in position.
4. Remove old regulator - 4 screws and take it out through the lower gap in the door panel.
5. Remove old motor - 3 screws and unplug electical connection.
6. Insert new regulator and motor.
7. Bolt new motor and regulator in and plug new motor into harness.
8. Reconnect door panel electric.
9. Raise regulator to uppermost position.
10. Bolt window to regulator.
11. Test window.
12. Reinstall door panel. It helps to have window down when doing this.
Time 1 hours or less.