So, I'd like to play this game with Crossover (haven't bought crossover yet, but will probably soon.) My question is this: Is this worth spending 20 bucks on? Is it functional enough that I can expect to play it at least fairly smoothly with crossover? FYI, I have a Macbook pro from the newest generation, 4gb RAM, 2.53 ghz, Nvidia Geforce 9600 512mb graphics card. Thanks in advance.