It is several tools which are separate tabs or worksheets within the spreadsheet.
- Geocode Addresses
- Optimize Route
- Initialization
- Mapping An Address
- Distance Between Zip Codes
- Drawing Drivetime Zones
Each of these includes full source code and can be customized... it basically shatters the kludgy MapPoint interface for doing things and shows you how to automate or program the MapPoint functions from lists and values in Excel.
If you're interested, send me a PM and I can give you an evaluation copy to review.
Eric