1. Download Transhextion in the Tool section
2. Custom title screen music only uses the Overworld museic which means (11-1f)
3. Insert (YourCustomTitleScreenMusic) into Addmusic remember the music readme must be renammed to (11-1f) Since that is OW music
4. Load Addmusic
5. Next after you have your music added in open Transhex(OR ANY OTHER HEX EDITOR).
6. Push Ctrl+G and type in this "x018c7" Without quotes
7. Now type in the music that you added (11-1f)
9. Load rom there you go