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!
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