I haven't tried this, but I think it will resolve your issue. Below is from the mortscript manual:
9.22.7 Heute-Bildschirm aktualisieren (RedrawToday)
RedrawToday
Redraws the Today screen. Useful if you did any modifications in the registry..
If I am reading the mortscript manual correctly, you should be able to disable the today plugin via the registry, RedrawToday, then do the rest of your magic.
EDIT: Check out this post for a good example
http://discussion.treocentral.com/sh...&postcount=117