You can do a "init=/bin/sh" at the lilo prompt and then follow it up with a "mount -w -n -o remount /; mount -a''
Then edit "/sbin/inittab" and change the runlevel to 3
From there you would reinstate your backup copy of /etc/X11/XF86Config
Or, ummm, re-run Xconfigurator
And like the HowTo says, be sure to do a "umount -a'' before turning off the computer;
And of course, you can do a <CTRL><ALT><F2> to get into another term (but I suspect that this one will be scrolling too)
Actually, after re-reading your post, I would try this first. I doubt it will work, but it's easier