I tried File -> option -> Schedule -> Calculation after edit -> Off
And Task mode -> manual scheduled
I want to set start date at 12/01/09 and end date at 03/03/09 but I want to set the duration to be 182 hours.
Change your task to 'fixed duration.' Load the number of days you need in the duration column. Because you made your task fixed duration, those days will remain fixed. (In your example, one of the resources you will need to make this work is a time machine.)
Then, load 182 hours in the work column. Since the task is fixed duration and you hardcoded 182 hours, then resource utilization will auto calculate.