About This File
This changes the Main Menu music to a file in StreamMusic called "Mus_Atris". I don't know if it's actually music used for Atris but it sounds good to me so I made it as the Main Menu Music. It also changes Darth Sion's music, but in my opinion this music fits him in a way.
Just Copy and Paste Mus_Sion into your StreamMusic folder in your kotor 2 Directory and it should be good.
If it asks to overwrite anything just click yes or click the button to overrite it.
There is also a Rebuilt Enclave Song Main Menu Music change here made by me 6 days ago: