Audit mode, Disk Cleanup utility of Windows 7 SP1 and sysprep

Hi

In Audit mode, before running the sysprep /generalize /oobe /reboot command, I have to run the Disk Cleanup utility of Windows 7 SP1 to delete any unnecessary files or this is not necessary?

In other words, the removal of unnecessary files made ​​with the generalize option of Sysprep is the same removal performed with the Disk Cleanup utility build-in Windows 7 SP1 or not?

Thanks

Bye