Add to preferences w/ Zimlet?

[arw]

Hey,
We would like to create a Zimlet that will add some sections to perferences. Preferably we'd like to add another little section under the 'Mail' Preference group (ZCS 7).
Is there an accepted/standard way of doing this? The preferences will be for a server-side extension we have already developed.
Of course it would be possible to do this using the onShowView(...) zimlet function and just parsing/hacking the DOM but that seems less than ideal... is there a better way?
Thanks if anyone can shed some light!