The German C&L Computer- und Literaturverlag has published a book about creating CDs with open source programs. OS/2 and eCS is mentioned right on the cover of the book and some chapters deal with creating CDs under OS/2.
The book is only available in German.
Homepage of the book:
http://www.cul.de/cdrecord.html
The cover:
http://www.cul.de/images/cdrecordcg.jpg
Source: OS2VOICE
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