I don't see anywhere you can access this setting via Python in the PoserPython Methods manual.  I see counting normals, flipping normals and such, but not some way to just toggle the Normals_Forward setting in the material room in Poser 7.  I have found numerous flower models that I've purchased from Daz and others that need this switched on. I have to do it manually for each of the model's parts because they use different maps. Or is there a way to copy and paste one setting change to all without messing with the other nodes?