Ok right my original answer was that I had exactly the same problem & solved it
See this thread here
http://www.short-media.com/forum/sho...rome+total+war
Now I used to have a copy of the config file which I was going to email you but I appear to have lost it.
Also in that thread is link to the solution which was well explained, however it was hosted by ezboards & appears to have been lost after they got hacked
I will install my RtW again & see if I can fix it & report back in a day or two, in the mean time go here
http://forums.totalwar.org/vb/showthread.php?t=45315
for an explanation on how to fix it which again links back to the ezboard post but does explain it.