Don't forget that the windshield washer jets go through the insert too. You'll have to remove them as well. It's actually a simple process & should only take you about 15-20 min.

You'll probably break/lose several of the blanket fasteners during the process & should be able to pick up replacements at your favorite auto parts store. You won't be able to get exact replacements so just take one in with you & get the closest match.