by Auria » 08 Mar 2013, 01:04
sorry, I don't think this is currently possible. Unless maybe if you play with 4 players, since 2-player gameplay will put the two subscreens on top of each other.
if you want to try for 4 players, you could open the config file, switch STK to window mode, and enter a window size that is very wide and would spawn your two screens. Keep a backup config close though, this was never tester and may give weird results, especially in GUIs