However, I am using a MacBook Pro with an Apple brushed metal chiclet USB keyboard. There is no Insert Key. On older Mac Keyboards you could just use the Help key. But there is no Help key. lol. The answer is in the help documentation, but its buried deep. So here it is.
Insert Key on Mac KeyboardOld Mac Keyboards: Help key
New Mac Keyboard: Function-Return
You could call it Function-Enter too, but my keyboard says "Return" on the enter key. Anyway, works like a champ for me. Thought I would share to save some other people a little time.