I downloaded and used this software on my Mac Mini PPC. Open Source Software ROCKS!
If you need to burn data or audio CDs with your Matsushita CD-RW which comes on the Mac Mini PPC then this program works.
The install was extremely easy and I ran the program, added the files/folders I wanted to burn to my data CD and viola! The thing, she is done, as they say.
Pass this around to other Mac users you know.