Make sure when modifying those values that your using a IEEE 74 calculator, for example, if the the value that's already their is 80 A2 41, and you want to change it to say 85 you'll use 00 AA 42. The game using decimals when calculating bonus values, and the IEEE 74 values allow it to do that. Here...

Skiller was correct that I was modifying the bonus values for each stat; I mentioned that there is a save hacking guide on gamefaqs that can give a good idea where to mod for the MP/HP values and I can verify the do in fact work. Though I will mention their a little off.

http://i.imgur.com/pyMnZmc.jpg The highlighted areas are where you'll do the modification; for example, you see in the first highlighted address 20 97 42, which when reversed in is 42 97 20. When inputted into a IEEE calculator, this value is 75.5625; which for instance is my exact strength stat for...

And I do apologize for the double post, but how do add certain "permanent" status effects; like Manaspring and such, kinda like the save editor could for the PS2 editions of the game?

Yeah I'm at work and I'll show you where but I still need to locate the base MP/HP for the characters...

Oh so that's the plus section? When I used a IEEE calculator, the stats that I saw were around the base stat totals; so the stats you see on the status screen are only bonus stats? Doesn't that immunity to physical and magical affect healing? I'm trying to remember doing the same thing in the origin...

As it turns out you can mod the stats, their just well hidden; kinda like Star Ocean 5 stats; my issue now is modifying the HP and MP...
When I modded them I leveled up and used the Save Crystal and changed equipment as well and they stayed.

Funnily enough the stats (at least for strength, magick power, vitality, and speed) are stored as IEEE 74 values. Nuts I swear.

I've been for the life me trying to modify the character stats and I can't seem to do it; any ideas?

Is it possible to modify the level of the character to affect the stats, like Birth by Sleep? In that game, the stats are tied to level and the only way to increase the base stats of all the characters is to modify the level past 99; though, when I've done it it was imprecise.