Just wanted to add, you CAN make fix morphs across bodyparts on a "life" Poser figure with the MorphBrush tool. The seam between the shoulder and collar groups is a good example where things can easily go wahoonie shaped if you want to fix the typical bowlingball shoulders. The solution is to not smooth across the seam, but carefully, very carefully nudge vertices around at low strenght. It's tricky, but it works. (See pic of V3RR)

I still plan to regroup a few Unimeshes to make them more MorphBrush friendly and maybe add a waist group like Apollo and the G2 meshes have.