I don't know if Mike or Vickie will work in P3 they should since you get the OBJ however the functionality you will miss like conforming, Transparancy for eye lashes or see through figures/props but you should be able to find enough to get a good understanding of poser don't get me wrong they are out there go to free stuff goto last and work back that way you can get a good feel of whats there, also 3D-CCand a few others have good P3 stuff. regarding clothes for stills you can parent to the figure but for animation no good (been there done that;-)most props for P4 will work in P3 so for Free it sounds like a good deal

You might as well PAY attention, because you can't afford FREE speech