Download Mythicmobs and upload it to your server, download this package and put the files from the plugins/mythicmobs folder in the mythicmobs plugin folder on your server (In the appropriate folders), download model engine and put the plugins/modelengine files in the corresponding modelengine folder of your server. If you want me to explain better tell me
It's so cool! For someone who is very new to this type of stuff, I found generating the texture pack somewhat confusing but got it in the end. Glad I did because this thing is a beast!