maplestory v55 odin coding

umm i havent read the rules yet so if this is in the wrong section plz dont flame.umm ok i have a odin v55 private server. can some1 teach me how to code custom items and custom npcs and ya just custom stuff

- No posting of Warez/Serials/Cracks/keygens, or links to sites with said content. Do NOT ask for such things either. Repeated violations of this rule will lead to a permanent ban.I think this comes under that, but I would really read the rules.