Feel free to download it and see what you think. Hopefully it is self explanatory enough that people can figure it out. If the demand for a tool like this is enough, I'll flesh out some support and help pages.
The download is a demo version and is limited in it's features. It will function for 5 days and allow only 5 cities. If you like it there is a buy it option which will remove the time and number of city restrictions. The price is $15.00.