OK, first I find BiaB excellent, as I use it to test chord progressions I think up in my head, but anyway, I have a problem?

I completed a song, which has 100 bars, a 2 bar guitar solo intro, and a 16 bar bridge solo, the ending is a solo ending, but here's the problem, the bridge solo and the intro solo are perfect, but I'm not satisfied with the ending solo, but if I press F4 to re-render, it re-renders the entire song, what I want is to be able to re-render particular passages without affecting the rest of the song, IE re-rendering just the outro solo passage from bars 81 to 96, is this possible?