Note: This cheat requires that you have the Airport Tycoon 3 patch installed. Also be sure to back up your files before making any changes.To get into the game data, go to My Computer, C: Drive, Program Files, Global Star Software, Airport Tycoon 3, data, db. Better airlines can be put into the game quickly by using wordpad to get into the "airlines" file by right clicking on the file, choosing "open with", and selecting WordPad. If you change the value for the "QUALITY" section (which ranges from 1 to 5) to 1, all airlines will be available as soon as you start your airport (this number can be found right before the name of the airline's HUB city). Having these airlines will make larger planes come to your airport. Then save your changes.