By no means is this as elegant as the DieselGuy's bedroon vent covers, so don't be disappointed.
First get 2 or 3 sets of Picture hangers(see below), you need 6 hangers, more if you are challanged like me.
Drill a hole big enough for the screws that are already in the Skylight (see below) and cut off excess.
Remove one of the screws along the long side of the skylight (should be 3 on each side). Put the hanger on the screw facing down and reinstall the screw. Repeat for other 5 screws.
Now you should be able to slide the Silver Solar Cover into the slot created by the hangers.
This can also be used on the Montana door window using its screws, 2 on each side and 1 or 2 on the bottom.
Allows you to slide in and remove the Silver solar cover as needed.
Sorry I don't have a picture of the finished product, as the Montana is in tempory storage while having a driveway paved.
Hangers
modified hangers