In many C6 server packs, certain custom NPCs or events are tagged with c6_event = true . Search for c6 within the file.
You cannot open L2 client files with standard text editors like Notepad. Doing so will corrupt the file due to the 413/111/121 encryption schemas used by NCSoft. You need specialized software: l2 file edit c6
Used for advanced modifications involving textures ( .utx ), animations ( .ukx ), and 3D maps ( .unr ). In many C6 server packs, certain custom NPCs