Access to secure database without admins group permissions

[Sam Olima]

Hi,
We have a database which was connected via linked tables to a sql server
database on a server. The server harddrives have failed and I cannot get into
the access database at all now. The server which had all the security
permissions set was our AD server so now all users are no longer valid. Is
there any way we can add new users to the admins group so I can import the
objects into a new database? We have been unlucky to lose our network
administrator at the same time as the system failed so are a bit stuck. Any
help will be really appreciated.