A couple weeks ago I read an article in popular science explaining how if you MBP was plugged directly into the modem or router you could turn on the share internet settings and it would in essence turn you mbp into a wireless transmitter and another computer in the house could pick up the signal and run wireless. My question is can this be done with my imac? Can I use the imac to send the signal to my mbp? If thats the case I could get rid of my airport extreme.