I noticed you found the stupidly broken slashing trick. This trick not only works against Hanumachine, but it works against ALL bosses that can be hit with a ground slash. It's more effective against some bosses than others, but with luck manipulation it could be effective against all bosses. If you're wondering why I didn't use this trick in my S-rank run, it's because I discovered this after I did the run =(. They fixed this bug/exploit in the later Zero games.
I actually considered doing a fast as possible speedrun, failing a bunch of missions, but I thought it would be boring. Maybe I should try it sometime since I only have to fail two missions.
Some notes:
-I can understand S-rank, but why 100% score? It would just mean killing more enemies and it makes no difference in your overall ranking.
-If you're still going to go with 100%, then here are two numbers for enemy ranking I can remember off the top of my head.
Rescue Colbor: 15 enemies
Destroy Train: 19 enemies
-Since this is from SRAM won't this be rejected by default? I would like to see a hard mode run (even though it doesn't make much difference in this game due to the slash trick), but I thought the movies had to be from power on, not SRAM.
-If you're going for S-rank hardmode, I suggest you do the retrieve data mission first. It's the fastest way to get the shield boomerang, which will help you take care of bosses that can't be hit by the ground slash.
-I found a way to jump on the submarines in Stop the Hacking. It involves using the triple rod, and I have a demonstration
here. This trick is useless in a normal mode run or a fast as possible hard mode run, but it might have some use in an S-rank hard mode run (since you will want the shield boomerang anyways). You might be able to optimize this trick by hitting the fish instead of luring the squid upwards.
I'll post more stuff, like boss AI patterns later.