I've noticed that when an iCal reminder alarm pops up a window you can "snooze" the reminder alarm for a period of time. The weird thing is that some of my Macs have more options than other. Some have:
Repeat 1 day before event starts Repeat 2 hours before event starts Repeat 1 hour before event starts
Most all have the small set of snooze options, but only a few of my machines have these extended options and even in those machines the snooze options aren't all the same on every machine.
Is there a way to program these options so that I can use them on all of my machines?