[Custom NPC's 1.7.10] Question regarding use on a server

[Hunterzilla]

Hello, first, I love the mod, I've learned how to do almost anything I need to do with the mod, on Single player. Now I'm setting up the mod on a Server for myself and some friends, when I went the usual way of adding custom Skins for my NPC's I was able to view the skins myself and they worked, BUT my friend can't see the skins and the NPC's appear as Black and Purple. Is there something I need to do to allow my friends to see these custom textures too? If so it is not made very clear in any guides I've looked up.

 

The Server I'm using is Hosted by McProhosting and using their interface I also tried to copy the same setup for a client side to view textures and they still can't see the textures. The only other mod on this server is Pixelmon 3.5.1

[Noppes]

You will need to either give them the skins and let them put it in themselves or you need to make a resourcepack and have them use it too.