Are they Windows 7 machines? There was a repost of VSEMAS8700 to enable Windows 7 Deployment support
The updated package is available here : https://secure.nai.com/apps/downloads/my_products/login.asp (Log in with your grant number and it will be under Endpoint Security, AntiSpyware Enterprise Module v8.7)
As for how to clean up the Agent when you ghost machines, you need to delete the following registry key and value, then shutdown and image the computer.
[HKEY_LOCAL_MACHINE\SOFTWARE\Network Associates\ePolicy Orchestrator\Agent\AgentGuid]
my clients are using windows xp sp2