Sysprep location in VSphere 4
You may find the following warning while clone a VM.
Windows customization resources were not found on the servers.
In ESX 3, Here is the VMware Support Documentation for Installing the Microsoft Sysprep Tools.
http://www.vmware.com/support/vc13/doc/c13installsysprep3.html C:\[VirtualCenter_installation_directory]\resources\
windows\sysprep\
For ESX 4, the lcoation changed c:\Documents and Settings\All Users\Application Data\Vmware\Vmware VirtualCenter\sysprep