Super Mario Bros 3 (U) (PRG 0).nes: bb5c4b6d4d78c101f94bdb360af502f3
Patched ROM (w/ LIPS): 4155bd54a492ebdb0b49ecf6ff55fb97
In the video I had already beaten the level, but nothing happened differently the first time than what happened in the video. I died (repeatedly) before I figured out how to beat Bowser, so I started from the half-way point.
Either way, the path to world two is still blocked. I'll start over and try again. Does skipping a level have any effect on things? I think I accidentally skipped a level my first time through on the PowerPak (but went back and beat it), and I skipped most of them on the emu (but not the final castle).
Edit: Okay, maybe it was the level skipping thing. I just made another run, and everything worked fine.
Edit 2: Beat world 2. I do say, good hack, sir!