i've been wanting a ceiling fans in a few rooms. i'm not too worried about the wiring as much as how it mounts. in one room i want to put it where the ceiling light is now, but i don't know how you tell if it's strong enough to hold the fan weight. in the other room i want to move the fan over a foot or so from where the light fixture is so i guess i need a differnt new mounting box anyway. any suggestions or directions to a site with info appreciated. thanks.