A nice chap on the Garritan forums helped me out and told me about an update for Pro Tools which it seems Digidesign had hidden away in the depths of their site and not linked from the Check for Updates feature. So this has fixed the freezing problem I was having with GPO! And now everything’s running brilliantly (so far – expecting a CPU overload error any minute now). I got keyswitching working last night, which is genius, and have been messing about with percussion today. I worked out how to make a blank region so I could just write in notes, and discovered that there’s a whole channel for mod wheel control, so I can just draw in the mod-wheel data needed to control my drum rolls! Wheeee!