As Al stated above removing the locking pins is the way to go. This is a great link from team 1640 that shows in great detail how to do it.
http://wiki.team1640.com/index.php?t...r_Locking_Pins
Team 1468 is using Jaguars to control them and with the locking pins removed we have had no problems with the window motors.
However, as also stated above you need to see how much load you're putting on the motor as the thermal cutoff will give you fits as well/