Make sure you order your skin ranks as shown above ! They must be in ascending order otherwise the game will just load the one after the next, which may not be the skin you want for that rank. If (( backpack player ) = 'insertClassnameHere' ) then
Here are the codes you need to add custom textures for cop uniform skins, medic uniform skins, medic backpack skins, cop backpack skins, medic backpack skins allocated to certain ranks, cop backpack skins allocated to certain ranks etc.