At the INI folder in your Sims 3 install directory (Default: C:Program FilesElectronic ArtsThe Sims MedievalGameDataSharedNonPackagedIni) right click 'Commands.ini'. Then select 'properties' and uncheck 'Read Only'. Right click again and select 'Open With...' notepad. Now change 'TestingCheatsEnabled=0' to 'TestingCheatsEnabled=1' (without the quotes). Save, and choose 'Yes' if you are asked to overwrite. When you now load up the game you will be able to click and drag the Hunger/Energy and sim relationship bars left or right to make them full or empty. The 'help' console command will now also give you a list of additional cheats.
During Furnish mode select the desired floor pattern from the available floor patterns and press and hold the 'Shift' key. Then Left-click the mouse while hovering over the active floor to place the partial floor pattern. Doing this enables you to place floor patterns in partial sections rather than whole grid squares.
Press Ctrl + Shift during Furnish mode and scroll over a light. When the mouse icon changes to an asterisk-like icon click on the light to bring up detailed light options which includes 'Turn Off Light', 'Set Intensity', and 'Change Colour'.