First, don't do anything oblivious like leaving in the original music.
1. Rename Music to the Number of the music it replaces. Repeat for all songs needed.
2. Copy/Paste all songs into the BGM folder for SDGO.
3. Make sure to replace the original music with the new ones (DO NOT KEEP BOTH).
Use this for anything I missed:
Also use the Q&A thread/BGM Thread for more questions, don't make more threads please.