If you have planned to distribute the agent through image then I will suggest you to create a framepkg.exe file from the ePO server, execute on the machine locally, delete agent GUID and MAC address from the registry and create system image.
Are you talking key in registry (HKLM=>Software=>Network associates=>ePO=>Agent=>Keys)? If you are talking about the registry value 'keys' then its not needed.
Image creation is done by other dept so i am supposed to give them framepackage thats it
and they want local admin framepackage, local admin password on xp pcs is abc
for local admin on xp pcs ,from the epo i created a package as shown below but is this procedure
domain : .\
Username : administrator
In the domain field, you can write either Local or .\