How to Encrypt l2.ini with a Custom Key and Update the Client Decryption Key?

[Telol]

Hello everyone,

I’m trying to encrypt <span>l2.ini</span> with my own custom key for a Classic p166 client. after modifying the encryption, the client crashed with a critical error on startup.

Could someone clarify the following?

• What is the correct procedure for encrypting <span>l2.ini</span> with a custom key?
• Where is the corresponding decryption key defined in the client? Is it in <span>Window.dll</span>, or another module?
• What client-side changes are required for the client to read the file correctly?

Any guidance or relevant documentation would be appreciated.