As laggy as the 4-player run is, I really enjoyed it. It forced me to pick up this game and try it out for myself. Unfortunately, I really don't know enough about it to play it with 1 player, let alone 4.
Anyway, I figured the 1 player run could drastically be improved by just changing the order of the first 3 houses and killing the bosses faster, so I tried it out. Without much effort, I got the first three houses in order, and it appears that after the game is started, the order of the houses is selected. After that, you need to go to the junkyard and work your way back to the school.
Here's the fcm that I started. I don't really like the way it's coming out, because, although I know it will be faster than the currently published run, I think it could still be improved upon. I'm still trying to nail down this contra run, so I really don't have time. This is open for anyone who wants to try the easily improvable run, but has a hard time getting the first three houses down. I've played through it many times after the start of the game, and every time so far, the first three houses are in order.
And I hope this helps the 4 player run get the houses in order too (not too familiar with the programming side of the games, I'm afraid).
http://dehacked.2y.net/microstorage.php/info/1057/noes.fcm%5B1%5D