Below is a MLB stadium chart that I used last year. I got it here somewhere, I forget, but it's from 2005.
Better yet, go to
www.ootpmodsquad.com and download the Gambo 2007 Stadium Chart. I just did so today and it's in the process of knocking my socks off. Unfortunately, all data must be entered in the game manually; I know of no automatic upload of stadium data if that's what you meant.
Note: You need Excel for these files.
Edit: I decided to remove the file that I originally posted here, as the ballpark factors in it were misleading IMO. See my note below.