Extract the updater in your lineage2 interlude folder, and run Lin][NewAge.exe let it finish and it will start the game for you.
A desktop link will be made also.
In case you have problems with game guard. Add this lines in your host file:
216.107.250.194 nprotect.lineage2.com
216.107.250.194 update.nProtect.com
216.107.250.194 update.nProtect.net