place the following line in the ammo crate class
model = "\myaddon\crates\modelname";
example
class ESP_CrateEODBlufor : ESP_CrateAmmo
{
displayName = "EOD Crate";
Vehicleclass = "ESP_ARMOURY_BLUFOR";
model = "\esp_veh\misc\eod_crate";
class TransportMagazines
{
class ESP_M19 { magazine = "ESP_M19"; count = 10;};
class ESP_Satchel { magazine = "ESP_Satchel"; count = 10;};
};
};