SECURITY TEMPLATES

I'm not sure why you would want to delete a policy from a security template. Are you using the MMC snap-in templates? Templates are designed to allow the application of certain policies or the disabling of certain policies to make your system moresecure and to be able to do that without it becoming such a tedious task. I have usually applied the template(s), then disabled the policy that I don't want run, or enabled depending on my system's or LAN needs. I would need more information from you on what you are trying to accomplish in this instance and which policy you are trying to remove. Why not just disable the policy once the template is applied? More info please.