Snooze intervals

[pinetreehater]

Is anyone aware of a method to change the default snooze intervals on WM6 calendar. I would like to add custom snoozes (such as .5 days or 18 hours). The default ones are not adequate for me since they only include a either minutes or a whole day.

[pinetreehater]

Alternately, if one cannot change the snooze intervals, which calendar program is the most similar. I do not want to loose features.