If you look at this app as a setup, as well as a direct real-time player, this becomes a bit more work, but very easy. If you are trying to do this live on the gig, yeah, it won't do it at the moment (but these guys are GOOD, I used to code, but I can't imagine how they could get this much functionality out of such a small memory and engine.)
But if you export the file 1X-in, 1X solo, 1X out (So 3X as a WAV, you get a full chorus of each, plus whatever intro/outro you created.)
I bring this file into Adobe Audition (use your favorite WAV editor,) mark the exact cut-and-paste points for the sections, then assemble my arrangement. After a bit of practice, a simple arrangement takes about 2 minutes or less, and a complex chart like Tunisia, with the solo breaks, long and short intro breaks, all the rhythm changes - maybe 10 minutes, tops, if you know what you want going in.
If you are serious about using these tracks, not jut for practice, this gives you a MUCH wider set of choices. I keep my notepad on the same page as iReal b, so O can make notes about new or edited arrangements. It works beautifully for me, except I'd like to select which sample set I was playing for any given rhythm - the guitar playing the piano chord might sound a bit odd, but when it's background it adds color. And the accordion in the straight Rock would be killer zydeco... But all things are possible through the will of - MIDI export! So you CAN get anything you want, you don't even need Alice's Restaurant (Sorry, I'm probably a LOT older than you.) Just a good MIDI library and some time.
Bookmarks