Relinking CD Audio in Dreamcast Games?

[Velocity 7]

Does anyone know how to do this? I'd like to somehow hack the IP.BIN file, view all of its LBA references, then modify the references so that a certain audio track will play another instead. For example, if the game asks to play track 4, it will play track 1 instead.

FYI, I'm trying to get this done in the game, Virtual-ON - Oratorio Tangram. I have a dumped list of the original GD tracks attached...if anyone can help me (especially Megalexxx), please post.

[Megalexxx]

I'm not sure how it works exactly.

In my opinion, the executable make some kind of "call track number xx", and this track must be the number xx on your CD. It might be just like on a CD player, when you want it to play track xx...

I doubt ip.bin needs to be modified.
Darkfalz surely knows more about this than me. He wrote a program to hack 1st_read.bin in order to accept CDDAs :
http://darkfalz.hypermart.net/software/index.htm

[Velocity 7]

EDIT; Solved my own problem. I'll have a talk with Darkfalz later.