Well there are "easy" ways, but they are all overkill. It's like attempting to attack an ant hill with a battletank.
Mamehooker reports monitor orientation (or at least it used to and still does afaik, mame changes so rapidly these days), so you could use it. Hyperspin has nothing to do with the problem.... think about it, you don't want your monitor rotating every time you select a game, you want it to rotate after you've launched the game.