Not sure why it would be doing this, and don't know much of anything about RH9 or MS-VPC.
However, assuming that the X11 login is using runlevel 4 as most linux's use, you could, at the boot prompt, add " init 1" or " init 3" after the kernel-name you are booting, so that the machine does not switch to graphical mode automatically.
From the resulting login prompt, login as root to edit the configuration.