[Wlug] VNC performance

Hi All, I remember some time ago talking with Andy, and others about VNC performance at a wlug meeting. I remember that setting the depth 8 will help performance, as well as disabling the wallpaper. I am running the server on windows, and the client on a linux machine. VNC's site has info for disabling wallpaper, but it seems to involve editing a registry file. When i try to do so, i get an access denied message, because that file is read only. Can someone help me out here? I really know very little about windows. On the client side, the option '-depth 8' doesn't seem to do very much i get '16 bits per pixel'. If anyone knows of any other methods for speeding up VNC, please post. Thanks, --Brad