Hello,
i found a nice KB: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=100249...
theire you see the infos about
examplevm.vmdkexamplevm-flat.vmdki personally didn't knewed that it's possible to change the vDisk name with "vmkfstools -E"
> this process seems to be also changing the Pointer info inside the Descriptor file
So important is that everything is renamed to you're new Wished VM Name
. after that it should be no problem to register the VM again.
Best regards
Max