[Greasemonkey] Any way to do stuff before the DOM is fully loaded?

[Bill Donnelly]

Can you "re-set" the values that their page is setting?
You should have full access to their JS values.
You can also modify their code and rewrite the page.
It's kinda sucky, but it works. (potentially blinky, etc.)
Please let us know what you end up doing and how you do it.

-- 
I often enjoy Casting my Pearls Before Swine,
if only to trip them up, piss them off, and/or
totally freak them out.
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I didn't ask to be Overlord of Balloon Doggies --
the Balloon Doggies demanded it!