I'm sure the answer is right under my nose. but I can't find it. How do I install GPO4 so that Sibelius 6 recognizes it. I installed the Aria player with both standard and notation options. I'm running it in Sonar 8.5. I have to copy the Aria DLL somewhere so that Sibelius 6 knows it's there. But I can't figure out where to put it. Can someone point me to the appropriate tutorial or set of instructions? I can't find them.