Thanks, Andrei, but I need a bit more guidance.

When you say 2. Switch to Box Set tab, are you referring to the Part # for Part of multiple-disk set in the General tab? If so, I've already done that for the four discs in my set, selecting 1/4, 2/4, etc. However, I don't see the Move up/Move down keys you're referring to which will change the order of my entries.

What am I missing here?

Thanks.