Here's a dopey terminal trick for all you Jaguar users:
nice +20 /System/Library/Frameworks/ScreenSaver.framework/Resources/ScreenSaverEngine.app/Contents/MacOS/ScreenSaverEngine -background &
Be sure to make note of the process number so you can use the kill command later.
nice +20 /System/Library/Frameworks/ScreenSaver.framework/Resources/ScreenSaverEngine.app/Contents/MacOS/ScreenSaverEngine -background &
Be sure to make note of the process number so you can use the kill command later.