Medzinatar, that option did seem kinda confusing, even after reading about it in the manual:***

Use External Binary Morph Targets***: Checking this box will enable the use of External Binary Morph Targets (EBMTs) when saving new content, or resaving legacy Poser files. Saving legacy figures to the Poser Library with this option enabled will generate new .pmd EBMT files for those figures, thus allowing you to take advantage of morph target sharing, reduced file sizes, and faster processing speeds for your legacy figures.

I have already used Legacy figures, altered them, re-named, and re-saved them to the library. I've also altered and saved some Kids4 figures. How will unchecking the "Use external binary morph targets" affect the stuff I've already saved, if at all?