Your Lua should look like this :
livery = {
{"texture f-16-okras-r3.bmp f2 g0", 0, "idf.dds" , false},
{"texture f-16-okras-l1.bmp f2 g0", 0, "idf2.dds" , false},
{"texture f-16-okras-l3.bmp f2 g0", 0, "idf2.dds" , false},
}
name = "IDF"
countries = {
"AUSAF",
}