Sorry for reviving an old thread but just in case you're still considering working on this hack I do have a few suggestions.
I played through the game Lavos was a little challenging this time, but then I went back through the Black Omen (also challenging) a few times and got more prism dresses and with the three girls it was actually pretty easy.
Started up a new game + and almost beat Lavos with just Crono, got really far into the final battle but then I got hit so that my HP was about 36 and then the Left Bit (which had recently been revived) smacked me in the head and I died. Pretty much the most insulting way to lose that battle, but still I it was really fun. If I had had access to the adrenaline item you mentioned then I probably would have stood a better chance with a prism helm and moon armor. But still I could probably do it if I wanted to even now with a haste helm.
Anyway my main complaint is about the lack of a reason to do a new game +, I'm not sure where I got the impression but I had the impression somewhere that you had removed tabs ordinarily but instead had set it up so that somewhere you could buy them at an exorbitant price. Maybe I just have a strange imagination, but I think that would be a great idea, not necessarily available even in the first play-through but only in the new game + eventually.
That or some other method of powering up would be nice perhaps (though this to me seems more difficult to accomplish) increasing aspects of character's ultimate equipment on other play-throughs.
But I guess it is a kind of moot point since I could already (maybe) defeat Lavos with just Crono (by using the Haste Helm, Prism specs and a whole lot of barriers, shields, and elixirs).
I do think there should some incentive to do a new game + though, other than to see all of the endings.
Edit: On the third attempt I beat Lavos with just Crono, the 2nd attempt I got hit with that dang lightning bolt when my HP was down about 200 and before I could toss up a barrier. I had only enough time to either heal up or set the barrier and I needed both to survive that strike. Owned.
My third attempt was better, I admit I reloaded a save state once, but that was to prevent me from losing my status defense which turned out to be a very wise decision. And I did survive a lightning bolt strike this time, happened to get hit with a barrier on and full HP not to mention that my MP was low so it was the perfect time to use an elixir.
After that strike and before the elixir my HP was I believe 28.