top poster of the week

[EidolonAH]

I need a mod that is capable of calculating the top poster within a given week (7 day period).
The mod would need to have the ability for me to stipulate the start date and end date of the calculation. Perhaps the same type of date set up used in the UCP where we enter our date of birth, so if I wanted to calculate the top poster last week I would use the following options:
From: 04 09 2009
To : 10 09 2009
It would need a submit button so that when clicked the mod would check the userposts between those two dates and then show me the resulting userid who has made the most posts within that time frame.
I need this to coincide with the user of the month mod (which I am making Member of the Week!), presently there is no method of making a choice for the member to be the member of the week built into that mod. So I thought a simple method would be to base it primarily on the users post activity within the respective time frame.
Can anyone help me please.
Eidolon