Indeed Geoegress, I made a few "second skins" using that method. 

The thing is I was hoping for a way to add freckles to any skin I choose to use, without having made "freckle versions" before, using random points. I think Baggins or BagginsBill or someone with a similar name made a script to do that sort of thing.

I suppose the problem for me really is that there are so many possible ways to do things, and I'm not organised enough, so I try to find the easiest road without having to plan ahead too much. The moment I think, hmm I'd like to add some freckles to the skin of this character I rendered, all the rest is done and it would take a while to load up PS, find the skin file and open it, add the freckles to skin texture I was using, save with new name, return to Poser, select in material room the new skin, re-render again, notice the freckles don't come out the way I wanted, so go back to PS again etc etc. (and using most RAM memory, slowing everything down ...)

But the method you propose is sound, no doubt there, especially if you plan well in advance. I just wish for magic buttons I suppose :)

Lunedust