Seriously though.
Dylan, Set up an MCPC server with MCMMO, and Biomes o'Plenty in it. One is Bukkit, and one is forge.
Play around on the seerver in Survival mode, specifically mine up a bunch of Cobble stone, and excavate some dirt.
You will level up in MCMMO, but then look for the Blocks that Biomes O Plenty adds in. Go and do the same thing, you won't level up.
So now the challenge comes in.
How do you add in the Blocks from Biomes O Plenty so that MCMMO recognizes them and lets you skill up.
This is one of the harder issues to solve in Minecraft modding.