Hi, the adman and the adhorse figures can be used in Poser 6 or Daz studio without a problem.
The adman v2 figure and the adman WM(extension), must be used in Poser 9+ because the use the new Poser rigging system (Weight map rigging) introduced in Poser in the 9 version.
The other figures you can download in my site (adh3d.com) that I am not the creator, Apollo Maximus and Antonia Polygon, can be used in Poser 6+ too ( the Antonia polygon WM must be used in Poser 9+ for the same reason )
If you have any other doubt or question, please tell me.
Best regards