Sorry for the long reply (I got some other new games), but just replace the files in the Programfiles/...../Data folder of F/A-18 game with the corresponding ones in the .zip file (you probably already figured this out). They are both actually the same files (have the same name), but I simply changed the data for the loadouts on airforce aircraft. For example, the F-15C full anti-air loadout will now have AIM-120 AMRAAMs instead of AIM-7 Sparrows, making them more survivable. Again, sorry for the long reply.