I have 2 desktops at the office. I use the main one in dual monitor mode and I tend to max out its meager reasources between web browsers (for code testing) a music or other media player and all of my developer tools. I want to be able to use the second machine for non-developement tasks but I do not want to have to toggle my monitor back and forth and/or switch keyboards and mice to do that.
What is the lightest weight (on the main machine) solution for controlling 2 machines from the same monitor(s)?
Both machines are WinXP sp3.
Edit
I'd like to go with a software solution that allows me to manipulate both machines more or less simultaneously. Changing my focus from the screen to a KVM to switch back and forth just to change music tracks might be more hassle than it saves in resources.
Of the various VNS client/servers and Windows's own Remote Desktop, which uses the least overhead?