Well, for me I did boolProp snapObjectsToGrid false
Then I clicked it somewhere random in the room.
THen I typed it back in, only this time I said boolProp snapObjectsToGrid true
After that it let me put everything diagnal. It hasn't worked for my friends, so it may just be for me. not 100% sure, though.
Your first question, I saw that somewhere. I don't use that though. For motives I use maxmotives.
For skills and relationships I do it the old fashion way. It's boring when you do everything with cheats. The motives I use a lot, so that I can get their skills done faster. But yes.