When new Webs are created using FrontPage Explorer, their default permissions are the same as the root Web.
Web have the same rights on the newly created Web.
Therefore, Add and Remove are unavailable, because the root permissions cannot be changed within a new Web. Unique permissions can be set so that a new Web will not inherit its permissions settings from the root Web. This allows a Web to have unique Administrators, Authors, and End Users, even if you make changes to the permissions of the root Web at a later time. In FrontPage Explorer, click Permissions on the Tools menu. Click Apply for the changes to take effect.