hmm...
you may have figured this out, for future reference or in case you need to help someone else -- you don't have to do anything with part 2 and 3. they just have to be there for part 1 (the EXE file with the computer icon) to use. you just need to run that one EXE file to install the game.
i'm not sure what you meant by "all the installers"... but if you just started running various applications in your RO folder, that can jack things up real fast. it's possible that the official korean server (kRO) makes players get that certain antivirus software (or more likely anti-hacking for the game, but i thought that was nProtect/FindHack). the only things you should run are anesispatch, anesis (if you want to start without patching), anesissetup (to change some settings), rsu-kro-rag-lite, and rsu-kro-renewal-lite (these patch the "core" of the game that is not specific to Anesis).
i do see something in my folder called ASPLnchr that seems to be associated with Ahnlab. so there is some legit connection there... it's just not something we need with our server. i hope you can get things sorted out on your pc and give Anesis another shot.