This is a custom set for the IXEG 737-300 X-Plane 12 version. It is compatible with Ground Handling Deluxe by JarDesign. You must own the Ground Handling Plugin Deluxe edition by Jar Design,  in order to use this file. For the istallation just move the file IXEG737ClassicP.set to the :\X-Plane 12\Resources\plugins\GndHandling\Sets\Custom folder and enjoy ......... Vasilis.