Iwasgoodonce
Old School Grand Master
As mentioned above, I have a car that is held together with the little blighters. Whenever I use pop rivets, I'm amazed how firm they are. Here's the sort of thing you need:
http://www.screwfix.com/prods/42307/Han ... nd-Riveter
http://www.screwfix.com/prods/42307/Han ... nd-Riveter