QNX RTP + TNT2 + 1600x1200?

So I downloaded the free QNX last night, and am quite impressed so far,
except for one problem: I can’t seem to set my resolution to 1600x1200,
16 bit color at 85 Hz refresh. I have a TNT2 Ultra, and a Sony 500PS
monitor, and these are the settings I use in every other OS. Anyone have
any suggestions?