Philc has got an Array script in poser toolbox, that may do what you want.

Of course, it is fixed distances, it seems.

For something like Carrara's Surface Replicator...there is a randomnization to the locations (which seems "addable" or makeable, based on something like PhilC's script as a base...for owner/personal use only of course)

...there is also spacing (i.e. when randomizing, don't choose a point that is within x/y from another (this seems the hard part)

...a randomnization to the rotations

...then you could use a drop to floor script on all of 'em.

I gotta believe that someone has a mathematical formula (random distribution of points or something) for it, then it takes someone to plug that into a python script for props