Go to Game->Register page and create Coliseum Account (Is ussed as game account).
After registred and loged go to main menu Game->Downloads.
If don't have client Classic ZAKEN dowload it.
Download server Path
Extract game in directory that you want to install for example "C:Program Files (x86)NCSOFTLineage II"
Copy and paste patch files inside lineage II folder replacing files, after copy enter inside lineage II/system folder and create shorcout to L2.exe move new shortcout to your desktop. You can rename it or change icon.
Enter in game with Coliseum account user and password