I had a prologue autosave, but some of the stunt jumps were completed. Is there a way of resetting the stunt jumps so it says 50/50 left to complete? Or else making a save to the Michael/psychiatrist cutscene? I thought I could replay the Franklin and Lamar mission after completing it in the run, but then, when I finish that mission to start calling taxis for the last part of the run, it puts me in a loading screen and restores the game, which isn't ideal

enable autosaves, play through prologue and keep that savefile.

If you are on PC you can always download a savefile (integrated in P1.27 if you have that or just download it from the resources section here on src [any% classic no om0 -> trevor% -> f/l])

Thanks, I got it working using downloaded save files