Step 3 - Copy the system folder to your C4 client In order to do this you must have Winrar (software used to Compress/uncompress files) open the file: L2Phoenix_C411.00.rar and extract the system folder. After that copy it and paste it in your C4 client in the root directory EX: C://My Programs/Lineage II - C4/(you must paste it here).
Step 4 - Launch the game using the L2.exe P.S: Do not use the L2Phoenix.exe or your game will not work and you may experience critical errors.