Sounds like you got all fixed up, Pipedoc. I was going to suggest google on "rivnuts". Very similar to the popnuts I suppose.
My Aprilia is chock full of Rivnuts. Very sturdy and reliable IF THEY ARE SET RIGHT THE FIRST TIME!! Argh!
I ended up buying the tool and extra rivnuts. The tool I have has a threaded stud and a T handle that you tighten down on...as you tighten it draws up the "rivet" portion of the nut and expands it. Does a good job...tool was $100 bucks though...I like tools...used it twice.
For future, some guys have been successful getting a bolt of correct diameter and thread, stacking washers on the bolt and using a wrench to tighten it. I never could do this: the rivnut face would spin against the washers and not tighten...
Anywhoo...this reply was completely useless since you fixed the problem already. I did up my post count, though.