Open the archive with WinRar program:

Then place the files fron archive into the game filder on your computer (Example: D:\Games\Lineage2Ertheia).

4. Update the client with the UPDATER
Details >>>
Run rpgupdater.exe file
In the window choose Ertheia chronicle, then click "Check files" button

You may also choose language in upper right corner of the window.
After all files are updated click "START".
ATTENTION! If updater causes ERROR, turn to support files >>>
+ RPG-CLUB TRADE BOT
Bot (for Ertheia) can be found at address
bot.rpg-club.com
Bot uses MS Silverlight, you may need Internet Explorer browser.
Follow the instructions on the page!