Poser is very nice for quickly doing human artwork. Take the time to buy an upgrade to Poser 4.
Poser 5 is debateable. I refuse to upgrade because, one, Poser 4 works fine, and two, I have been told the render engine on Poser 5 flat out will crash, even on 2000/XP.
Whatver the case, don't joke about using Poser's render. It sucks big time. Only the sketch renders are really interesting; the full texture renders look worse than what a noobie can get making from scratch on DB and then pressing PRINT SCREEN.
Export your Poser stuff to 3DS or OBJ format and render with any good 3D prog. I have seen folks get nice results with Poser and no other 3D prog, but you will need to do a ton of airbrushing in Photoshop.
And, don't even think you can use it for DarkBASIC. The models are way too high poly. Even with optimization in other programs, I can only get them down to 2000 for a male and 4000 for a female.
We can't stop here! This is bat country!