Change Power Save plan command when starting a game

Hi,
What is the command that would switch the Power Save plan automatically when
starting a game - since the Monitor Power off on my normal Power Save plan
is set up to 5 min? That is, there is an option to "Customize" a game start
up by executing other commands too; the option is available in the context
menu of the game link in the "Games" folder.

I want to set up a Game Power Plan that is activated *at least* at the
opening of the game file; of course, a batch file to switch back to the
normal Power Plan at the closing of the game file would be even better.

In XP I could make links to different power saving modes... I can take it
from there. My 7yo son plays some games and I do not want to make it more
complex than that; 26" monitor uses some 135W so I do not want to leave it
on for long periods when not in use.

Thank you,
Michael