Look at pic and careful folder structure. Replace nurse with whatever your pic name is. Hope this helps. Working on the Jug to work. This is for P-51 in saved games folder.
livery =
{
{"pilot_P51_kneeboard",0,"mfd3",true};
{"p51d-mirror", 0 ,"mirrors",true};--mirrors texture replacement with runtime rendered one
{"p51d-cpt_photo", 0, "nurse_photo", false};
}