I know we can't edit everything in the free version of REDitor, that's why I said before that it would be great if someone with the full version help us to take the roster hex editing a step further.
I would like to know more about team editing, change team type, editing coaches (I would like to put real coaches in the retro teams since they have their graphic files in the game), maybe some other changes in the jersey tab (specially making created teams wear real uniforms, I already know how to assign a jersey for a created team, that's easy it's the same process as changing arena in the example that Jaosming has posted, but there is some other editing left to do like removing the logo -maybe the logo is removed when you change team type?- or disable using the CAT colours)... summarizing, I would like to create my own teams without the create-a-team limitations (hex editing a created team) so I could create retro or european teams.