Character Creation for the Plot-First Novelist begins with a character center and then adds layers in a logical fashion, coming at character creation from a variety of angles ? everything from how we perceive people in real life to how the character is (or isn't) impacted by the love of Go
The System Alone: The document explaining the system alone (i.e., no CharPick; you can use the system this way but there will be reduced functionality)
Jeff Gerke's How To Find Your Story mentored me through the development process with understandable word pictures of the inner journey and the moment of truth--and all the other balls a novelist juggles to build a story, some I'd never considered.
As I mentioned, you need either The Sixteen Types or Please Understand Me II to work the system.
You can create characters using the system if you have items 1 and 3 only, and you can have fun with item 2 by itself, but to get the full effect you need all three item