James,
Jake is on the road this week so I'll try to help you.
DLD-VGA is a real mode ADI 4.0 driver. Renderman doesn't support display
output to real mode ADI drivers, so you have to get a protected mode driver
like DLD386-VGA. I think Diamond has this on their BBS, but I'm not sure
the number. You can call their main number at 408-736-2000 and get the BBS
number without having to wait for tech support.
Brad Ek [Panacea Inc.]