Afraid that's not possible. Browse through this "scripts" and the "feature requests" areas of the forum and you'll find I'm one of the active and vocal owners bemoaning "what could have been" with the completely half-baked scripting commands and the importing/exporting/sharing of scripts and scenes.
Kaleidescape has probably put the nail in the coffin of all of this with their new "authorized" (Kaleidescape-supplied) chosen scenes. It doesn't remove our ability to make our own scenes, but it pretty much ensures that the average user will never even investigate what this set of features can do since they now get some "chosen" scenes from Kaleidescape. I suspect we've seen the last of user-supplied favorite scenes here on this forum, and I doubt they're being exchanged much anywhere else. A bunch of people here created thousands of great scene files, but the whole concept of sharing these never took off.
Personally, I believe that it was self-fulfiling prophecy on Kaleidescape's part. Release a feature that was never well implemented, with a terrible UI (uncharacteristic for Kaleidescape) and then look at the stats and say "huh! no one really uses that, so let's not work on it much." If it had been well done in the beginning, I think it would have been used. Want to see the most NON-Kaleidescape UI and bizarre interface things ever? Just try importing scene files for movies you own and watch it try to match to scenes you already have. Half-explained symbols like (*), scenes showing up in Italics that is supposed to mean a matching name to what you have (doesn't always work), and no de-duping or updating ability so you end up with duplicates as you reimport files from users that may have renamed a scene. It's pretty much a disaster, but they neither fix it or kill it. A real shame.
Anyway, rant off. you're asking for something reasonable but not really possible in an easy way. If they even had script commands with variables, or simple things (requested here on the forum) like a command to play the first movie in a collection, then what you're asking for would be simple.
If you really want to get fancy, you can do it with TCP/IP-control of your players... it's not all that tough. See the example I gave of Sync-Play, which I implemented for my home. (Ability to make the same movie start PRECISELY at the same time on multiple players). It works by creating a script in a text file using commands Kaleidescape has made available (with decent documentation even!). The script can issue commands to one or more players. It's pretty fun to monkey with this stuff.
If you're proficient with AppleScript, you could probably do exactly what you want. But even on other OS's you could easily do it with text files that issue commands to your players to do what you want.
--josh