While I was working on my Lost Industry 2 project I tought I might share some perfabs, this door is one of them. It skips the work of putting down a prop_door_rotating, frame and wall around the door. It was very useful for me, I wanted to share it with you guys.
It's easy to install, just take that .vmf and put it into the folder called "Perfabs" (\Steam\steamapps\common\Half-Life 2\bin\Prefabs). I hope I made your life easier, you can mess around with it however you want. You are free to use it, you don't need my permission.