matchbox and that old admin folder question

[eluser]hyperfire[/eluser]
Mine needs that too.
On modules folder, i really have only modules that are activated if they are on the modules folder. Otherwise, that 'section' will not show up.
To create the module table on the db, once module is loaded, it performs a check to see if its related table exists, if not, create it.
But when a module is removed, how to erase just the module related tables to get a clean db?