the "zombie apocalypse" pack offered in the "STORE" is false advertisement. since none of the features are working not the "textures pack" that comes with, none the "resources pack".
if the company that created this pack works for you you have to contact them and tell them that the products that they sell are defectuous.  is not like you go to a fast food restaurant and when the food that you roder is wrong the manager of the restaurant tells you to go and talk to the cook right ? ... what kind of service is this ?