Customizing the agenda item format

[Matt Huszagh <huszaghmatt@gmail.com>]

I'm attempting to create a custom agenda, but having a bit of trouble
getting this to work in the way that I want. In particular, I'd like to
be able to specify the display format for each item.

Here's what I've got so far:

(setq org-agenda-custom-commands
      '(("c" "Custom agenda view"
         ((tags-todo "hardware|electronics|mechanical_engineering"
                     ((org-agenda-skip-function '(org-agenda-skip-entry-if 'todo '("HOLD")))
                      (org-agenda-overriding-header "Hardware")
                      (org-agenda-prefix-format "  ")
                      (org-agenda-hide-tags-regexp ".*")))))))

This gives me something like

TODO some headline title

This is close to what I want. But, all my items are TODO so I don't want
to display this. In other words, I just want

some headline title

Then, I'd also like to display the title of the page, right-justified,
in parentheses.

So,

some headline title                                (some page title)

Another display I'm considering is to present the full outline path,
rather than just the title, so something like

some/headline/path                                 (some page title)

I can provide functions to get this information, but I don't know how to
present it in the agenda.

Are displays like this possible? `org-agenda-prefix-format' gives a lot
of flexibility for the prefix format, but I wasn't able to find
something similar for the actual item. The "Presentation and Sorting"
part of the manual also didn't give me any leads.

Thanks
Matt