LadySilverMage, The operative phrase in your post is "an existing MAT I created." What did you create the MAT in? If you wrote them in a text editor they should be fine. But I suspect it wasn't a text editor and whatever you created them in may encode your files in such a way that when you open them an ascii editor like Notepad, you see things run on and unformatted. If it was a MAT maker program of some kind then that's likely what's happening. The format it's saving the .pz2s as may not be ascii or at least not the same ascii format as a regular ole text editor. However, when I said "existing MATs" I meant one's that come from DAZ for instance or that have been created from scratch in a text editor. They seem to come into Notepad (if not too big for it) fine and save fine. I've made MATs in MAT Pose Edit and then opened them manually in Notepad to make a change and the file's got little black boxes and is all unformatted so as I said before, I use it mostly as a color reference getter.