Hi Seb, The VM/ESA-based online tutorial was removed in 2004. It was based on the book, CMS Primer.
There is a z/VM V5.1-based CMS Primer in the online library. http://www.vm.ibm.com/library/ Here's the PDF of the CMS Primer, http://publibz.boulder.ibm.com/epubs/pdf/hcsd6b00.pdf You can also download copies from the book center/bookshelves. Regards, Pam C