Trying to rip segmented .mib music from "Wallace and Gromit"

I'm trying to rip the music from the PS2 disc of "Wallace and Gromit in Project Zoo".

I've got the original .mib-files from the disc on my HDD and tried to convert it to .wav .

However, it creates .wav-files that are segmented, which means that that it contains all 3 or 4 different versions of a track in one file.

The problem is that it plays the first 0.5s of version 1, then the first 0.5s of version 2, then the first 0.5s of version 3, then 0.5-1.0s of version 1 and so on.

How am I able to rip such a specific kind of video game music perfectly (maybe with HEX editing?)?
Any help is really appreciated!

Here you have some links.
To the original .MIB file
To the .wav file