I'm a VM newbie so I probably shouldn't be answering, but I followed the directions in the Virtualization Cookbook word for word and was able to rename my system volumes. The Pub number is SG24-7272 and the link is: http://www.redbooks.ibm.com/redpieces/pdfs/sg247272.pdf
Section 4:10 is 'Relabel the system volumes Mary Anne
