Hi Sharon,
We also have had no problems running afni on multiple Dell PCs with preinstalled RedHat. Without creating a big off-topic thread, though, be aware that RedHat will stop supporting RedHat Linux after April 2004 (e.g., security patches via up2date). You have to switch to RedHat Enterprise Linux to continue getting support, and from what I understand, it is not a simple upgrade; you have to install the Enterprise version over the "free" one. I mention this because I bought a preinstalled RedHat 8 Dell PC in June of this year, and now I'm looking at an operating system upgrade if I want to continue to get security patches after April 2004.
Something to be aware of if you're shopping for Linux workstations.
Donna Hanlon