Here's the compatible version of custom winsock dynamic link library for 6.2 which comes with windows 8. For those who are having problems on windows 8, simply replace ws2_32.dll with this one.
Tsukuru is an advanced macro tool for Ragnarok Online that you can interfere any incoming and outgoing packets, edit them or even block them via internal scripting. Check wiki page to find more information. And check Tsukuru page to download most recent version.