With assistance from EE, I've gotten VNC running on an iMac displaying the screen on a W XP system over ethernet cables. My hope is to control the Windows machine from the iMac and eliminate the monitor and keyboard for the Windows PC.
So far VNC is much too slow for my purpose which requires that I really be able to use the W PC through the iMac. I can keep working on it but would like to know if it is worthwhile? Is there any way I will ever be able to type, click, etc. without being frustrated by the delays or should I just forget about VNC?.