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I don't understand what problem you can meet while setting up your joystick..
Here is the post in which I asked a solution to fix the response delay.
Make SURE your all your joystick, rudder .. Are well calibrated on Windows. Then in game assign them to the correspondant "analog command". That's all what you should do. I didn't change my sensitivity and dead zone in the game. Nope. All my curve are by default except Throttle who have 0%.
My question is. How to make the joystick less sensitive while affecting the mouse?

You should un'Assign the mouse from your flying command. Bind it for the views instead.
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Here is a couple of screenshot to show you my settings.
https://dl.dropbox.com/u/37999001/Im...9-54-28-32.png (129 kB)
https://dl.dropbox.com/u/37999001/Im...9-54-39-98.png (183 kB)
https://dl.dropbox.com/u/37999001/Im...9-57-24-01.png (243 kB)
This way I can have great fun on Take On Helicopters. Even with the Hind ! I admit that fighting with it is.. "Pain in the ass" cause instruments are insufisant but flying it is a real pleasure.
This game deserve to be play with a good joystick ♥ I have 214 hours of flying ALONE in TOH. What could it be if I goes to MP.. This game is exelent. You should try again to set it up. It's not that hard.
https://www.youtube.com/user/hon0p/videos