A buddy of mine let me borrow his XT250 (I don't have a car right now) which was a godsend. It was fun getting the wheels and tires to the shop. I had to make two trips!
Widely known secret of cave man, use three tyre irons, hold one down with your knee while you use the other two to stop the tyre coming off and force it the rest of the way, until the one your holding with your knee slips and you get a swift gender change.
But seriously thanks for the info, I'll go find some for the next time.