I know this is an old post, but I'm hoping you are still out there John Maisey...? I followed the instructions on your link several times, however my reminders still come up as a message at 4:50pm the day before, plus an email at 4:50pm the day before.
I would like to set it up so that when I create a new event in my calendar, the default reminder time is at 8am that day. Message only, no email.
And the time it is set for is an hour ahead of the time I am creating the new event (i.e., if it is 12 noon when I open a new calendar appt, the default time for this appt sets at 1pm).
Is there a way to do these two things?
I am using iCal Version 5.0.3 / Mac OS X Version 10.7.5 (MacBook Air purchased in December of 2012).