In windows, go to control panel, click Printers and Other Hardware, select game controllers, then double click on Interlink, and use the settings page to calibrate to windows. In the sim, I just have 3.5 so i don't know exactly how it is in G4, but there should be a controller drop down menu on the main screen with a "calibrate" selection, then just follow the directions it gives. If there isn't anything like that, then there should be something in the manual that tells how to properly calibrate your Interlink within the sim.