How do you mean 'define'? You can create a personal dataset that you can stat out a class. The internal editors are not the greatest, so it would be a better idea to do it by hand if you want to go this route. The documentation provide with PCGen does give a lot of insight on the various data tags. If you have questions on how to implement something, you can always ask at List File HelpMacbeth said:I seem to remember on some release of PCGen, at most a couple of years ago, being able to define custom classes. Can you do this in the current version? How?