Tempoary screensaver disabler
If you want to defrag your drive, but you don't want the sceensaver to come on and yet you don't want to disable the screensaver in display properties, then try this:
Start the program that you don't want the screensaver to come on, and get a heavy enough object to press the SHIFT key down, that should prevent the screensaver from coming on. <img border="0" title="" alt="[Wink]" src="wink.gif" />
This should work in 95, 98 and probably ME, 2000 & XP as well.
Now just remember to take the object off the keyboard to avoid any unwanted surprises like accidentally opening several desktop shorcuts at once. :p