Just type cheat boolprop allow45degreeangleofrotation true Exactly like that! i recommend u to write that cheat on a paper so while playing your game u can type it.You open cheat box clicking ctrl,shift und c at the same time. Hope I helped! And btw,to rotate something in 45 degree,click on this : , Yes,just this , Grab that thing u want to rotate,and just click , Keep clicking on , if u dont like the pose of the thing. :] But make sure u typed the cheat first :)
Type 'boolprop allow45degreeangleofrotation on' without the's and then select the furniture of whatever else. Use the < and > tools to rotate the item that direction, and it will rotate it diagonal as well. Hope I helped