go to ww2 fighters/data/missions folder and locate file called "fly_now.mis", right click on it go to "properties" and make sure its NOT selected to "read only", if it is unselect it. now right click on the file again and select "open with". scroll down the list until you'll see notepad. make sure its NOT checked off to "always use this program to open this file". when you select notepad hit enter and it'll open the conetents of that mission. the first paragraph that will be indented contains the data about your plane. default is P51, you can change to any plane in the game. also don't forget to change the "weaponloadout" line a little below to the same aircraft. loadout example: FW190_FIGHTER is clean loadout, while FW190_BOMBER_DESTROYER is fw with gun pods, etc. hope this helps.