In the end, I just dumped the entire contents of jQuery.jplayer.js, the player script that loads in the window and the playlist script (all 3, I just grabbed from viewing source after a non-ajax page with the player loaded). No need to wrap it in anything, just put each one, one after another, in the Ajax Page Loader reload script section.
I’ve found the Ajax Page Loader to be a little quirky, though, so you may want to paste everything into an editor and then paste it from there into the Reload Scripts section if it’s not working properly.