AFAIR that is still the 9000Pro you got from me with just 64MB and AFAIK no R200 has dual head support. If I'm mistaken I should be able to pull that off with the Voodoo and 128MB 9000nonPro that I have in mine.
I might also have a spare ADC-DVI adaptor if thats whats missing, but I'm again pretty sure you won't get any further than mirror mode.