I can't run Poser 4 any more without faffing about with virtual machines, but in my installation (which is more or less 'out of the box') the Poser 1 figures are, counter-intuitively, in the character:Poser 2Lo library. Their geometries are in maleOrig and femaleOrig and yes, they are different to the Poser 2 people. The Poser 1 man has all of 2997 polygons. 8)

(Edited to add screen shot from Kawecki's PropViewer - and a nudity tag, LOL)