I don't understand Japanese but I've managed to figure out a few things through trial and error to create a custom character set using Khmix's character maker (http://khmix.sakura.ne.jp/download.shtml).
This is an ongoing project for me for now since this makes it easy to randomly generate character templates and expressions on the fly. This set doesn't have a lot of clothing yet. I present to you, Katou!
For anyone else interested in creating their own custom set or adding on to my own, here's a rough idea of how it works.
Your folder structure must look like this:
[set name]
--[accessory_back]
--[accessory_front]
--[accessory_middle_back]
--[accessory_middle_front]
--[body_back]
This is where the nude body of the doll goes. It must have the same file name as the clothing from body_front & body_front_color.This is the layer that has the shadows for the clothing.
--[body_front]
This is where the clothing goes. It must have the same file name as body_back and body_front_color.
--[body_front_color]
This must have the same file name as body_back and body_front. This is what allows you to change the color of the outfit. You can even place just the outline of the clothing in the body_front.
--[eye]
This is where all the eyes go.
--[face_back]
--[face_front]
This is where you can put all the expressions in except the eyes.
--[hair_back]
This is where the back of the hair goes
--[hair_back_accessory]
--[hair_front]
This is where the bangs and side burns go
--[hair_front_accessory]
--[head]
This is where you can place any overal facial changes are such as blushes.
character.ini <- you need to change the dimensions to be the same as your doll. Make sure you edit using notepad.
When you create your images, make sure you save them in PNG-24.
All this should make more sense once you take a look at my custom set. It should also make it easier to figure out the program if you don't understand Japanese.
XD