You will need MC Patcher to recieve the whole affect of the texture pack. I made this to give more of a zombe apoc feel so you can play zombie apoc adventure maps and servers and I made gold ingots into gold coins.
Now more of the other mobs and now applied to random mobs. Also added 1 more zombie skin but you would need to change the name in the files.

YOU WILL NEED MC's PATCHER RANDOM MOBS!