I know its possible, I have scoured youtube, and modded so many files my head hurts, I can get single player working fine, and I can see the items (like a horse saddle, or spawner) but no mobs, and the spawner spits out pigs. I've used to bukkit port 3.6.2 as well, with no luck so, I'm wondering if there is someone out there that will take pity on me, and share their modded files for either a 3.1.2 or 3.1.3 server.
Thanks in advance if you can give me a hand.