Linus and Lucy (Charlie Brown/Peanuts Theme) - Vince Guaraldi

[pdxdjazz]

Also missing is how to change the rhythm of the player to swing during the B part, which would be handy. I'm not sure if iRP supports that, and it's sort of essential for this song. Any tips about that are welcome.

Linus And Lucy - Combined - Vince Guaraldi

Try switching the player style to Swing Two/Four.
It will swing harder for just the B section (on the 1st and Final player repeats)
That might be the best choice from currently available 3 combination styles.

The other option is to combine bits from two iRp tracks you like by using a DAW.
)BOB