Need to change volume labels

[Ranga Nathan]

I need  to relabel the volumes for my 2nd level z/VM, which is our test 
environment. This is something coming from our z/OS sysprogs.
Is there any way to change all references to volume label using some 
utility? If not where all would I need to change the volume labels?
I can think of  SYSTEM CONFIG, extent control (dont remember how to 
access this) and the directory entries.
The DASD at 2nd level does not share any DASD with level 1.
Appreciate your help.
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Ranga Nathan
Work: 714-442-7591