[endgame]

The stadiums are a whole 'nother can of worms and must be individually assigned within the team's options page by file name. You can browse to your ballparks directory (where you put them, right?) and make that selection.

Usually, the game just picks them up when it loads. It has in past version with some expections. Perhaps, you can go to league setup's pic options and have the game update player pics. There's a couple of different choices there about what you want to achieve, but one of them will probably be what you're looking for, at least to attempt a load of new material. See if you can locate that option in the Player and Pic functions.