How? HOW? Lol, I couldnt get any of those beta keyblades to work, let alone Soul Eater, of give sora the way to the dawn.
Well, I sorta cheated in the first Soul Eater picture; before I found the items section of the save data, I had found the equipped weapon slot. So I just sorta jammed it in, lol. Though, after finding the item section, I ran into the same issue you did where you can unlock the keyblades, but it replaces them with Fleeting Fragment etc in the menu, causing it to crash the game. So I just replaced those slots with the keyblades instead and now they work from the menu. (Though now they show up as materials, but eh. This is Square's fault, there's something unnatural about how it skips over the unused keyblades. I'm guessing they put a check so that you couldn't hack them in easily? Kinda halfassed, though...)
I assume since those pictures are from the menu, that exiting the menu causes a crash?
Nope, they work fine. Well, Way to the Dawn crashes. You can't equip Sora with Riku's keyblades. Might have something to do with how the game loads them. You can force Sora to equip it without going into the menu via save modding, but it loads up as Kingdom Key.
As for Nightmare Clash, I haven't really looked into action commands yet, so that's pretty cool.
Not idea what it does though; I guess it's something from the Ventus Nightmare battle?
And just HOW did you get into the Radiant Garden from bbs? Mind=blown.
Found the value that modifies the location you're in when you save the game.
You wanna take over here? You seem better at this than me. Lol jk, but any and all info you could give would be greatly appreciated.
Haha, I'll pass. You seem to have figured out almost everything I have myself, save maybe the room mod, but I'll put that up and some other stuff in a pastebin in a bit.
Also, regarding the save editor, I get a 404 error when I try to download it.
EDIT:
See the following pastebin for the stuff I've personally researched.
http://pastebin.com/iupbBrjR