My (integrated) video card is identified as an "ET4000 W32i", which is not on the list in RedHat/instimage/usr/X11R6/lib/X11/Cards--but the "ET4000 W32i, W32p (generic)" is. I was able to work around the problem by copying the CD to local disk and editing the Cards file to insert the new key and a "SEE" backreference to the correct key. Before making this fix, I was unable to proceed with the install, even in text mode; the installer would error out with a "KeyError" due to the above problem. This cost me some hair, and would be good to figure out and fix :)
I should look before I leap; this bug is the same one as pointed out in 7322--but at least I have a work-around ;)
*** This bug has been marked as a duplicate of 7322 ***