calendar alert intervals

[zxsix]

When I create a new appointment in the calendar, it offers a few choices for when to set the reminder alert.
Those choices are static, instead of using a roller like on the date so you could set however many hours you want.
I need to set the reminder at 12 hours prior.
That's not a choice that's offered.
Is there a file I can edit to replace one of the other options with a 12 hour option?

[plukk]

do you sync your calendars with anything?

[zxsix]

Yes, I get push sync with an exchange server.
I know I could create the appointments in outlook and set any reminder I wish, but usually when I need to add these appointments, I'm out in the field with nothing but the iphone.

[plukk]

you could put the date in for 12 hours later and set it for one day reminder and you would get reminded at the right time but the time in you calender would be 12 hours ahead

[Mes]

I use Outlook (after a sync) to refine alerts and reaccurance due to iPhones limited capabilities. Hope newer versions/releases are more functional.

[zxsix]

I'm hoping for something along the lines of editing some plist file to change the 2 hour option to 12 hours.