Going by memory here:
Remove the two allen heads in the crush sleeves, one on each side above the mirror.
Reach inside and remove the two push pins.
Carefully work the crush sleeve out of the hole, it helps if you can wiggle your pinky finger in there and push out as you pull.
Windscreen should pull straight out.
The new one may be a tad tight going in, or it could squeak. Put a little tape on the tabs before you insert the new one to prevent the squeaking.
Once you get the new screen in place, push back in the crush sleeves, insert allen head and snug it up, you dont have to crank it super tight.
Re-insert push pins, and done.
Take picture and post on the oRg.