[Users] Keyboard shortcuts to inboxes

[Cliff Laine]

Scenario:

The focus is in the account and mailbox list on (my) LH side. I want to
go to the inbox of the account listed third down that list, using only
the keyboard.

If I press G then I, it takes me to the inbox of the first listed
account. If I press I again, it looks for a mailbox name beginning "ii".

Is there a way of altering anything so that repeated pressing of I
would take me to the next account's inbox?

Thanks 

Cliff