There is something of a workaround for this (although I hesitate to call it a workaround, since it works exactly as intended). The merge sets feature works like a champ for displaying multi-disc sets. So for instance, let's say that I have Final Fantasy VII. In the Setup Wizard I would set Merge Sets to Yes on the Advanced Emulator Setup screen. So long as my Disc Images follow a standard naming convention (I highly recommend Redump), Final Fantasy VII will only appear once in my Game List. When I click on Final Fantasy VII all of the individual discs in that set will appear on the game screen. Really I think this is preferable to only having one exclusive all encompassing entry for Final Fantasy VII in your game list. What happens when you finish playing through Disc 1? You would either need to change your config so that the single entry in your Game List now points at Disc 2, or as Adultery suggests you would now need to switch discs every time you start the game from that point forward. The above suggestion may not be a perfect fit for your use-case, but I've found it to be pretty satisfactory.