I couldn't figure that out either. Anyway, I don't think that mod was as great as you seemed to suggest. Guess I just have a higher standard for CS mods.
You need to find the Booster 0.8 for him to fix the rocket. Unfortunately, I couldn't find it anywhere, so I just hacked my save for it.
Even then, I couldn't figure out how to get the best ending :\
I seriously don't know what is up with that mimiga either. And most of the things I will be doing differently are going to be a surprise when I release it.
Oh, well then I'm all the more curious to see what you're planning since this matched up pretty close with what I imagined (apart from the start... seriously what was up with not-Toroko??)
The only reason they're not nice is cause of the Demon Crown. Curly: "I thought you guys were just jerks, but I guess it was all the Crown's fault!"
Misery and Balrog aren't very nice people. Balrog in particular was especially gleeful as he boasted to Jenka about conquering the surface and shoved the red flower down Toroko's throat. Which again, is why the regular best ending bums me out. I'm okay with him getting off the hook in the end, but actually going to live with the protagonists? really?
You could question then why they even bother saving Quote and Curly in the end. Gratitude I guess.
At any rate, she gave Quote a choice, to either renounce destroying the Core (which Quote was trying to do because he had been told this would restore the transformed Mimigas) or else...