Good luck with Castle 5, CtrlAltDestroy. I have improved 2-4 by 59 frames now, here:
http://files.upl.silentwhisper.net/upload2/new2-4.zip
I was hoping to grab all the three hearts in the lower left corner in a row, but I don't think it's possible, the Rocky intervened no matter when I timed my walk. If someone could make it though, it should save a lot of time.
And school is taking up much more time than I had thought, so I probably won't be able to work very much on this for a couple of days. I have these two mathtests this weekend, and they're stealing time from TAS :(. So I pretty much leave this to you guys for a few days, I'll check back here now and then, to see how things are going.
And I had missed that hanzou put up a list of possible improvements in his first post, until recently (that's why I improved 2-4 now). That should prove very useful, good thinking. Good luck with your improvements, everyone! :)
EDIT: About 3-4... You are talking about exploiting rocky twice in your improvements-list, hanzou. I've played around with 3-4 a little while now, and I think that doing that is not possible, or at least very, very hard. You see, if you pass the center using the the rocky as a shield, he will immediately turn up and then turn right, after you have passed the statue. The only way to use him as a shield twice would be to on some way manipulate him to walk differently.