OK, I found this:
But it`s for HTC Hero. At a first glance I think that it won`t work on the Wildfire because of the resolution, but maybe someone with knowledge of extracting apk`s and making update.zip files
(maybe applying the hero update.zip works directly woks, I don`t know, but the difference in resolution makes me think that there are different coordinates for display elements)
The general ideea is this,:
Extract the clock.apk from a Wildfire AOSP source
See if the modifications in the Hero files can be applied to the Wildfire
If not, maybe remake, or duplicate
create a .zip file that can be applied from a recovery mode.
I know it sounds like a lot, and I would do it myself, but due to problems and college, I don`t really have the time to start learning all this now. Maybe in the Christmas holiday.