This is a stadium mod that creates Doubleday Field in Cooperstown, NY. It was home to the Hall of Fame Game until 2008. I used MarkB's fantastic 2008 Waterfront Park mod as a base and created Doubleday out of it.
To install this mod, rename the stadium to whatever you wish to replace it with, then paste it into your stadium folder. Then, import fencday.txt into your datafile.big - that's it!
Remember that this will overwrite whichever stadium you choose to save over.