(re: Building a Sierra Computer) if you want to play old sierra games and not deal with the hassle of putting together and old pc, try dosbox. You can set the CPU speed to whatever you like, so it can run without getting timer bugs. You just have to make sure you configure it right so you get optimum speeds (setting cpu cycles, opengl on)… it supports General midi and I *think* the regular version supports MT-32.. if its not supported in the official version, i know this version supports MT-32: http://www.artworxinn.com/alex/downloads.htm
one thing though, for certain games you need to hit the exact CPU speed to get MT32 to play correctly (ie at normal settings QfG2 really sounds screwed up)