LOL ok been having more of a play on my E65 and think i've figured it out on that
go to where i said before
Settings > General > Personalisation > Standby Mode >
then scroll down past active standby apps and there should be another one labelled "active standby plug-ins" , go into there and untick "organiser" and possibly "to-do" as that is linked to calender as well I think.
Bob's your mother's brother then I think - combined with what i posted earlier you should be able to remove all traces of the calender from the normal display.