There are programs out there to move the mouse a few tics in x,y to keep screensaver from kicking in. I'd try one of those. I used a program like this many years ago to avoid getting disconnected from AOL during downloads. Nothing more frustrating than downloading FreeDOS on a 33.6k connection and getting disconnected at the 4kb/s transfer 3 hours into it and having to start over because I walked away from computer. It worked well to not have the mouse zipping across the screen and just moving the position to reset the AOL inactivity timer to keep my connection.