Actually, you can't just open it twice...you get an error on the second window because the game is already playing. I'm unsure how exactly he did it, ninja explained to me once a way to do it, but I wasn't paying attention :P not sure if the command prompt was even part of his but the error seems to be with 2 command prompts for Blockland being open at once. I opened Blockland using the thing that made it not open a command prompt, and I could open as many as I wanted, but he HAS command prompts...unless that's just 4 windows with 2 unused.
