Enable both PCI-Express and onboard video on Ultra 20 M2?

I don't see any bios options to enable the onboard video if I have a video card installed in the PCI-Express 16 slot. Is this possible? I'd like to run the workstation dual-head.
[187 byte] By [ievans] at [2007-11-26 10:35:12]
# 1
The board will detect a video card in the pci-e 16x slot and auto-disable the onboard video to avoid conflicts. Apparently , there is no way to manually enable the onboard video while a card is present.
mattbrun at 2007-7-7 2:45:27 > top of Java-index,Sun Hardware,Workstations - General Discussion...