Permission to modify Access db

[jclu]

I've been asked to modify an existing Access db, that was setup with user and group security. There is an Admins group which contains certain users. There are other user data groups which contain the users that are just entering data and viewing/printing reports. It looks like the users in the Admins group have a password associated with their account to log in, and the user data group's users don't have a password. Anyway, since I need to modify the tables and at least one of the forms, I need to have modify permissions. Unfortunately, all the employees who worked on creating this database, and whose user ids are listed as users under the Admins group, no longer work for the company. Therefore for me to even log into the database, I need to use one of the user data group's user's id. The creators also created an Access Workgroup Information (.mdw) file which seems to have 4 queries specifying the users and groups that are recognized and have can log into the db. However, I can't seem to modify the queries in the mdw file, and although the queries are linked to a table (I'm assuming is in the mdw file), the table doesn't show up in the Tables tab!