Ok, Dude i dont think you understand how complicate is to finish 12sky server using 4.18 Client
1. you wont have: Wars,Yanggok,HSB
2. Level capped to 99, rares up to 85 ( been confirmed by hez )
3. NO enchants,refine,upgrade or any thing similar to that
4. you wont be able to get any of the things above in the client because some part of engine wont accept it, with NO WAY to make it accept it
5. No GM commands
6.incomplete server files
7. game engine ( GXD ) very outdated
so you're basically stucked with : lvl 99, first 5 maps and caves of it, no extra other things. i suggest you dont use ur time with 4.18 KR client as it's useless