I worked in a game store several days a week during my university education. I've met many people with different 'gaming-skill-decreasing' conditions. Since it's probably to expensive to get your personal gaming controller (but there are people/companies who'd build it just for you) my recommendation is to have a look at input devices like pedals or wheels and map them to problematic functions. Or, but I can't tell if that works for FC4, use CoSMOS or similar programs to slow down the game via the speed hack funktion.
Thanks for the info. Maybe I'll invest in a new input device, Tried speed hack but it didn't stop the erratic flight control, it slows everything down so the objective is still moving away the same speed as the helo.