I just separated three screens form the Level Editor (Image Editor, Part Editor and Object Editor) and packed them into a Character Editor.
Now you can create your own character, with any number of limbs and its own physical properties, and use it for your campaign. Once the character is saved, it can be loaded for the Character Screen on the Level Editor and set to a starting position and pose, so it can be used on the level.
I was pleasantly surprised by how little time it took me to recreate my old character from scratch using the new editor.
To give you a comparison, this is what my older character "editor" looked like:
Quite an improvement, if I may say so myself =).