Dead Simple... The two plastic rivets inside don't have ANY effect on the windscreen itself but removing them will make the swap much easier. There is nothing that is going to cut loose and drop down inside your fairing. The Two small hex nuts on the top of your fairing are the only things holding your screen on and they attach to rubber boots with the captive nut at the bottoms.
So basically you gently push the centers in on the two Plastic rivets underneath just till they click and remove them.
The only reason for removing these is so you can push the rubber boots through from the top once you remove the allen head screws. You can just pull the rubber boots out and up from the top but it's easier this way. Just seperate the inner from the windscreen after and you will be able to reach in and pull the rubber boots right out.
Once you have the rubber captive nuts and screws out. The windscreen really does just slide right out.
Go ahead and replace the Plastic pop rivets, Push the inner part back up and through each rivet to "reset it" if you will.. Then slip the rivet into the inner and gently push the raised center till it clicks again.
Since your installing a zero Gravity you will want to put a couple layers of Electrical tape around the tabs where the windscreen slips into the fairing. This will prevent any vibration.
Once your screen is in place, thread the allen bolts into the rubber captive nuts, just a little bit... Then using a little lube... (Spit) pop the rubber nut and bolt assembly back in from the top, give it a good wiggle and make sure everything is lined up right, they should line up just fine, but they can take a little effort. Then tighten them up nice and snug... Your done.
Rev