"The Sims 2 University" Cheats
boolProp allow45DegreeAngleOfRotation true - Use this cheat to place objects at a 45 degree angle. Use the , or . key to rotate the object. Sims may not be able to use all objects at this angle.
setHighestAllowedLevel [level] - Works for the lot you are playing, and increases the number of levels you can build. Replace [level] with a number higher than the default of 4.
Building Dorms and editing existing dorms requires a cheat.