this was not originaly my post but i saved it.and it worked for me.
HOW TO CALIBRATE THE LOGITECH EXTREME 3D PRO JOYSTICK
I just figured out how to calibrate this joystick. I am using Windows XP. I assume it will work with all Windows operarting systems
Go to Control Panel, click on "Game Controllers", or however you get to your joystick settings. Hold down the "Ctrl" (control key) and the "Shift" key together - at the same time, THEN click your mouse on the "Properties". This should take you to a different calibration screen that you would get to without holding the two keys together. IMPORTANT - Click on the "Test" tab first. If you go to the settings tab first, it likely will not work. Without doing anything else after clicking on the "Test" tab, next click on the "Settings" tab. Then click on the "Calibrate" button below. Click "next". Click the thumb button on the left side of the joystick which should bring you to another screen. Then follow the prompts......
* On the "axis calibration", move your joystick in full circles, making sure the "+" symbol moves around the far margins of the square. After a few complete circles, click the "next" button with your mouse.
* On the next screen, click the left button on the joystick again, which should bring you to the next screen. Move the throttle lever back and forth a few times. Then click "next" again.
* On the "Z rotation screen", move the joystick to the left and right (rotate it) a few times. Then click "next" and then "finish" then "ok". Thats it. It should be calibrated now. Hope this helps everyone with problems.