A few things: You cannot play the edited team in anything other than one-off.
There are no limits on team power. You can have a team of all level 7 players with perfect stats. The team can have all the rerolls and cheerleaders. The only result is the team having an abnormally high value (4000+).
It took me a while to figure out too. Found the answer in p40 of the manual.
Thank you very much for this editor, that's exactly what I was looking for this game. Possible to modify everything on his team or the opponents, and it also works for the campaign mod (To do this we must not open the database but the save is in My Documents \ BloodBowl \ saves \ campaign. And now your team appears in "Team_listing" and your players in the "Player Listing" Very easy to use
-------------------------- In case anyone needs them and can't be arsed to alternate between the savegame database and main.db. This is for the idSkill_Listing when adding records into Player_Skills. I frankly don't know what all the skills do but you canl always experiment.