Guest customization (specifically Windows 2003) is done a little differently in vCloud Director.
While you still create a properly-named directory tree containing the sysprep files, you then run a script that combines all of the Windows sysprep files into one CAB for later use.
Step one is to copy the exiting .cab contents to a directory structure on the vCD cell using something like WinSCP (remember to use the “root” login, not a vCD user)
Here I’ve created it under /opt/sysprep.
Next run the script to consolidate the contents to one .cab file:
This will create a file under /opt/vmware/vcloud-director/guestcustomization named windows_deployment_package_sysprep.cab
If you open up that file you’ll see the existing sysprep tree structure mirrored.
Note: you should probably leave the sysprep files on the cell for use later – if you only add 32-bit files now and then delete them when you go to add 64-bit later the resulting .cab will only have the 64-bit files!