contacts/cases/tasks hierarchy

[SIMONEVA]

I have set up a new module for cases with the relationships set

contacts have many cases
cases have many tasks

Hence there should be only one contact for a task. However when I edit the task there is a contact field which has to be populated manually. Is it possible when editing a task to set the contact field to the correct contact automatically. How would I do this?

Benefit I am trying to get is that the tasks should all show up under the contact activities and history.

[SIMONEVA]

To answer my own question I can use Accounts rather than Contacts for my customers. Fortunately I only need one and if I use accounts it will link the cases the way I want.