I started looking at some of the files in OOO (although saving the modified version is a pain), and found some interesting things in the cs_parts_* files. The below investigation was made for the benchmark, but it probably also works for the full game. Modding Tools Installing Mods Insert new clothing items Mods that use these files can be fairly complicated. KS: The files are script files and require the use of CM3DExtractor.Adding this files and selecting the preset in game without the required clothing mod will crash the game.
CUS: These are preset files that usually come with mods that add clothing.VAC: These files go in the GameData folder and make up a majority of available mods.
A majority of mods for Custom Maid 3D are available as various file types that, in most cases, require very little effort to install.