Well all was going well until I went to load the file.  I loaded V4 into my scene, found my mat in the pose folder, doubled clicked and it popped up:

The file being read is not a valid Poser file

Any ideas?  I have version 8 so I changed that to 4, but changed it back and it still didn't work so I don't think that's the problem.  I copied the png over, and that loads in the pose folder.  I edited the file in notepad so I know it's not adding extra spaces or characters or anything weird like that to the code. 

I tested, and it won't load from the Materials folder either!  Grrr!