Finally changed these-it was quite easy!
Look at
http://tsx.acurazine.com/forums/showthread.php?t=701505 
for some pictures, although not as clear as I'd wish. And MY camera has a dead, non-charging battery
Anyway, let's start with putting the blade assembly back on. It just slides into the J-hook on the wiper arm, and there's a springy plastic tab/arm which then snaps into a hole on the arm to lock the blade assembly in place.
So to replace, FIRST put some kind of protective towel or something on the windshield, so if you accidentally let the arm go it won't crack the windshield.
Then, squeeze in the plastic tab and the assembly just slides right out of the J-hook.
Look along the blade holder: one end has a little triangle, and next to that on the blade it should say "LOCK." Once you have the blade out, you'll see that on the inside there is a little plastic tab sticking in from each side; the tabs pop into the dimple on the blade and keep it from sliding out. So try to visualize that as you basically take a small screwdriver and pry out one side of the blade. Don't pry right where it says LOCK-you'll break the plastic tab. Pry between LOCK and the end of the blade. You're basically levering out the metal insert* out from under the plastic tab. Once one side pops out, you can get the other side, then pull the rubber blade + metal spines. Mine slid right out, no problem.
It was quite simple, I was surprised. Sounds/looks more complicated than it really is (GRRR I wish my camera was working...) Slide the new blade in carefully, be sure to push it under the LOCK tabs, pull it end-to-end to be sure it's locked, and put the whole assembly back on the car. Done!
*The "blade" has 3 parts: the rubber part, and a metal spine along each side which is not actually attached to the blade.
Thanks
