Editing multiple tables in the backend

Hi all,

I've done a few custom modules (using the cd collection tutorial as a starting point), including parent-child relationships, and I've read the developers' guide.

Question: Is it possible to edit more than two related tables (parent-child) in the backend using the DCA?

e.g.: Manufacturer (parent) and RentalItem (child) are my main tables, so I know this can be handled easily by specifying them in the DCA. Additionally, I have a Company entity which can own many RentalItems (many-to-many relationship). Further, a RentalItem can be characterized by reference to ItemType and ConnectorType tables.

If it is not possible to do using the regular module structure, is it possible to add custom editing pages in the backend? If so, is it still possible to somehow get these forms to render automatically using a DCA specification?

Thanks for your attention.