AccessGrant? You mean GrantUnityAccess? These tools have nothing to do with one another. Permissions Wizard is for setting up service and installation account rights for system and container access. It has an excellent help file that covers all of what it does.
GrantUnityAccess is for providing administration access to the SA for non subscriber accounts (i.e. for centralized administration scenarios). It has nothing to do with rights in the system or containers.
