I haven't been able to work on it recently due to schoolwork (especially long English papers), but I left off at the frame I entered Kroop's house. I really want to work on it, though, and I know I will have time to do so in about half a week from now. Once I start working on it, it should take me about as long as the Prologue (a little over a month), since Chapter 1 is such a short chapter (the shortest, I think).
I also found a
way to clip inside the Koopas in Petalburg, which makes the game push me out the direction I'm facing. I tried it on the Koopa guarding the gate to see if he could push me through it, but he's too far away from the gate (if Mario could be pushed through at all).
I was considering fixing the movie file to sync on 3.0-378, but I think it'd be too much hassle for not much of a gain. Besides, I know the revision I'm working on, 3.0-305 "more-save-fixes", is stable, whereas people have begun reporting problems with the recommended "TAS-input" revisions.
By the way, I didn't try adding a delay frame before entering the Petal Meadows Pipe and I don't think it would actually save any time, since the lag (frame rule?) in this game usually makes any improvement under 5 frames even out timewise with an unimproved run.
