Server auto download items

I have my own RP server and it is currently working fine. The only problem is that i have custom skins, which i have hopefully installed properly. Well i think they do since one of the classes has an error for a skin. The only problem is that i want the skins and models to auto download so that when people join they can instantly see the model without downloading anything extra… is there anyway to do this because some of the maps such as christmastown down auto download aswell.

I would appreciate the help and love you forever <3<3