I actually got it to work without delaying the intro sequence at all, only having to shoot twice in a door to get the correct pattern in the penultimate room. The timer isn't perfect though, I lost .01 on it in 4 rooms to randomness. Getting both to be perfect could be pretty annoying, it's actually really lucky that it worked out as easily as it did in Snes9x, as there are two rooms where you both have to get optimal steam patterns and clock patterns. Dunno if the clock really matters though, I don't really care about it because it's still the fastest time, but other people might care more. After landing on Ceres the run is something like 24 frames slower than Saturn's ingame run due to the added lag.
BizHawk works very well in general, and the watch-tool is very nice. In Snes9x there's a 1 frame delay for every action in Super Metroid, and in BizHawk there isn't, so my brain is screaming at me that I'm doing literally everything at the wrong time, which is going to take some getting used to even though it isn't a bad thing in itself. But it's pretty frustrating how long it takes to go through the movie from beginning to end, as fast forward is at most 200% speed, compared to Snes9x which I could run at about 8000% speed (unless I'm missing some settig).
It's possible to read the movie file and edit it directly in notepad, but the rows aren't numbered by movie frame so it would be a pretty tedious task to do so.
Anyway, movie file and a watch for Super Metroid:
http://www.speedyshare.com/MdwcA/download/SuperMetroid100.bkm
http://www.speedyshare.com/HE48K/download/SuperMetroid.wch
