Groupwise DMS (one for an expert)

Ok I am trying to set up a groupwise doucment mgt system, all is well but I cant change some defualts. Heres the background, users from differrent depts. get e-mails about job numbers, when i want the users to save the e-mail the default is set to save to disk, how do i keep this so that it always is the default library and also the default documents tab is always ticked and dont want that either, beacause I have set a doucment type as department and a Job No is also a required field.