I have Poser 4 Pro Pack, and BosTer seems to work and render okay in that version.  However, the morphs can be very difficult to navigate through, and so I wouldn't recommend it.  It will work quite well in Poser 7 as long as the injection files are installed within it.  But I did not include Poser 7 for a couple of reasons: Although it is DAZ Mimic ready, it is not setup for Poser 7's Talk Designer.  I was also a little cautious about some of the "bugs" that have yet to be worked out in that version.  I figured it was probably better, in the long run, just to go with Poser 5 and 6.