You need to just delete any DLCs you want to avoid, and delete your EDIT data. When I do it on 360, I just unplug the hard drive and use a USB. Then I use one of the fake teams I haven't edited yet and transfer any deleted players to them and export the team. Then I plug the hard drive back in, copy the export file onto it and import in game. Copying the export file to your profile is important, because the game can't read it otherwise.