is there any command/external command that can allow you to change a computers resolution from whatever it is to whatever you want.

for example, i have a flash projector that can only be run at 1280x1024 however the resolution of the user is set at 800x600. can i change their resolution to 1280x1024 when my projector starts up and restore it to 800x600 when it closes.

please help me!