Here is a very very simple version of the differential equations to be used. No Loops, IF/ELSE, etc. just good ole fashion Excel. I do not have access to 2007 at my current location (came home for weekend). The file is 2003. Check it out and edit it as much as you'd like and repost it.
I WANT FEEDBACK!!!
ALSO WANT A BETTER NAME! Something Stealthy.