Just got me copy of ye olde 3DWorld Magazine Issue 96 (old for the U.K., new here in the U.S.)
Stated in the magazine that one needed Poser 4 as a minimum.  The answer is yes except for the Miki1+ figure (one needs P6 to get the face morphing dials to work).

However, that aside, it also has a ton of conforming clothing, shoes, socks for her and can be fitted on me Miki for Judy 5 ( reduced to 90 Percent of original size).  Additionally, several types of hair, and face and body injection morphs eyes etc.--haven't tried the eyes on my Judy yet, but I think they will work.  Some of you folks may want to take a look at the issue.  Plutom

That is if you like Miki