I think he means he's ripping the redbook music off the CD and wants it to play but doesn't know what should go where.
It really depends on what version of the game you have. The redbook music plays differently in the different releases.
I think I know where to find the info though...
Found it but only for D2 original release.
D2 original release:
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Track 2: Title (Menu)
Composed by Brian Luzietti
Mixed by Charles Deenen
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Track 3: Crawl (Credits I think)
Composed by Brian Luzietti
Mixed by Charles Deenen
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Track 4: Glut (Level 1)
Composed by Ogre of Skinny Puppy & Mark Walk
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Track 5: Gunner Down (etc)
Composed by Brian Luzietti
Mixed by Charles Deenen
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Track 6: Cold Reality
Composed by Larry Peacock & Brad Cross & Leslie Spitzer
Mixed by Bob Brown
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Track 7: Ratzez
Composed by Ogre of Skinny Puppy & Mark Walk
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Track 8: Crush
Composed by Brian Luzietti
Mixed by Charles Deenen
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Track 9: Untitled
Composed by Mark Morgan
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Track 10: Haunted (Instrumental Remix)
Composed by Type O Negative
Original version available on their album "October Rust", published by Roadrunner Records
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Track 11: Are You Descent?
Composed by Ron Valdez
Mixed by Johann Langlie
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Track 12: Techno Industry
Composed and mixed by Johann Langlie
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Track 13: Robot Jungle
Composed and mixed by Johann Langlie