I have the SDM - HS 73, I experienced a similar problem.
What I did to fix it was put it at the suggested (native) monitor resolution and refresh rate, which is I believe 1280 by 1024 (something rather large) and 65 or 75 mhz refresh rate. While in games that shrunk the resolution the screen tended to flicker randomly and do odd things that I don't remember, then I started to window games. I know ET allows you to play windowed, which helped a lot with fps and overall clean flow of the graphics.
As far as mouse, I use the IE Explorer Wireless, it has lotsa buttons that all don't work in RtcW but do in all my other games, odd. It's at the default refresh rate.
Is the problem occuring in windows as well? What kind of graphics card/mobo agp speed do you have? If it isn't an agp card ignore the mobo agp speed part.
I won't be able to read your response until later tonight due to rush week.