Okay, I've gotten the viewer to work. One of the least intuitive installations I've gone through (other than Oracle8i & Logic) in a long time. OMS itself isn't the issue, I guess: I've got to open OMS, get it to look for Quicktime & opt-click in to get to the Quicktime option in the Opus viewer itself for the individual instruments (one-at-a-time); & that's a little bit irritating, but I guess it's okay. I like the interface otherwise. It ought to be interesting once I get that other keyboard...