Yes... It's true. You have to enable the Testing Cheats in the "Commands.ini" at (Default: C:\Program Files\Electronic Arts)\The Sims Medieval\GameData\Shared\NonPackaged\Ini)
Open it with an Editor and change "TestingCheatsEnabled=0" to "TestingCheatsEnabled=1"
Then the console has some more commands and u can edit some things by holding Crtl + Shift and clicking on it. When u do that with you hero u can change his lvl. When u do it with some Sim u can make him your Friend or best friend... :-)