It used to be that most systems used to include an extraction method in the OS. Now it seems to be an 'extra'. See if Realband will allow you to open or import a File from the CD before opening the ACW.

In RB -
Audio-Import Wave File
You'll notice CDA is listed. This is for CDAudio files. If you have the codec installed, RB will use it to import the file.
If you don't you get the message you describe.

Maybe trying a different way will work for you.
If you get the file extracted, Export to Wave File and open THAT file in BiaB.


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