Sorry for the horrendous gravedig but it's always good to bring some activity...
Anyway, my school uses DyKnow too and I hate being monitored.
So, I wrote an app to send whatever screenshot you want to the DyKnow Monitor server instead of what's on your screen. It also disables the application blocking.
It's written in Java, virus scan it all you want, there is nothing malicious about it.
have fun, post if you like it.