How to add/delete a privilege "join computer to domain"

for windows XP pro
http://www.petri.co.il/joining_a_domain_in_windows_xp_pro.htm
for windows 7
http://windows.microsoft.com/en-IN/windows7/products/features/domain-join

you can give account operator rights to add/delete a privilege "join computer to domain

add the user in account operators group

HI all

I want to give only "join computer to domain" privilege

yes for this you need to add the user into "account operator"group in active directory to the person to whom you want to give privilege

Hi all

"Account Operators" - A built-in group that exists only on domain controllers. By default, the group has no members. By default, Account Operators have permission to create, modify, and delete accounts for users, groups, and computers in all containers and organizational units (OUs) of Active Directory except the Builtin container and the Domain Controllers OU. Account Operators do not have permission to modify the Administrators and Domain Admins groups, nor do they have permission to modify the accounts for members of those groups.

I can't give this built-in "account operators" group because they has a create & modify and delete functions in AD, So I want to provide a only "join computer to domain " privilege, So I want how to add/delete "join computer to domain" privilege?
Thank all

Do not fulfil my question