Thanks for the input. I'll look into that NVIDIA tool.
The machine in question sits on my desk, along with two XP-pro machines, but is also a file server and engineering application server for a workgroup. I've always been uneasy about trying to upgrade it, and then possibly being down for an extended period trying to get a new system configured. We don't have a real admin person, so we kind of feel our way around. My plan has been to get a new machine with the latest RedHat at some point this year, and transition the machines in parallel, so hopefully there's no down time. I'de like to be able to use it for emacs editing since it's sitting on my desk at the moment. I do that, but with only one monitor currently.