[O] Removing headers from custom agenda view

[Giulio Petrucci]

Hello there,

I'm playing a bit with the custom agenda view and have ended up with
something like:

(setq org-agenda-custom-commands
      '(("b" "Test"
           (tags-todo "STARTED" ((org-agenda-overriding-header "Started")))
           (tags-todo "WAITING" ((org-agenda-overriding-header "Waiting"))))))

I would like to have no header at all, like

  Task:       STARTED task1
  Task:       STARTED task3
  agenda:   WAITING task12

is it possible? Setting an empty value for
org-agenda-overriding-header ends up in displaying an empty line,
while setting NIL ends up with a default header.

Thanks in advance,
Giulio

--