Hi , since 1.4.8 version you can`t make anymore a super skinny or super fat character ini , but I will show you how
First , go to
http://www.tinyurl.com/skinnyepw and download facedata.pck file
After , go to your "epic perfect world folder" -> "element" folder and replace it with the downloaded facedata.pck (you must exit perfect world before doing replacement)
After that you just use the advanced scroll and in the body settings when you go to minimum , it will make it super skinny/super fat.
Also with this you can do more customisations to your character.
Preview :