Quote - I'l try to give a quick workflow runthrough.

Your goal is to make Vicki 9.9's breasts look less realistic. You take the base figure into a modeling program and do a great job of it. Save your work as a new .obj with a readily identifiable name back to the same folder. Then open the .cr2 file in a text editor and change the two references to which .obj file/geometry file is used by the character to the new name.

The two key files to making a character go are the .obj and .cr2 file. If you save the morphs to an external file, you also have the .pmd file, but just leave that alone.

Extremely helpful.  Thank you for breaking this down for me.

And thank you lesbentley, I'll look at that, too...