Yeah I've tried Anima, but I find the 3rd party software / interface for setting it up very clunky (why not just have an operable plugin for Max). My company is fairly new to visualisation, and whilst Anima probably works for some, if I can get FP to do what I need it works out as better value. The Forest Map lends itself to this task as I can mix up textures on the same assets, AFAIK Anima doesn't have that function.
Anyway, I've managed it to an extent, created the assets, their textures with Forest Map, and linked the FP object to the PFLow. I'm getting people walking through each other still, and thought the 'Keep Apart' node should avoid that, but I'm sure I'll get there eventually. Once I've fisured that out I just have to work out how to confine the particles to the confines of a specific mesh, and get them to avoid the edges a bit.
PFlow is a whole new world to me though, like all new things in Max it feels pretty un-intuitive at first.