so i tried that, i put both the exefs and romfs folders inside luma/titles/0004000000164800 (i switched to editing pokemon sun bc it would be easier) and whenever i enabled game patching with the latest version of layeredfs and tried to load pokemon sun, both of the games screens would turn grey after the game took abt a year to load.
not exactly sure why that happened, apparently it was an arm11 core (1) exception prefetch abort (svcBreak) but nowhere online seems to be having the same issue as me
im able to restore the game back to normal if i put the unmodified romfs and exefs (and everything else) into luma/titles/0004000000164800 and repatch pokemon sun so i know its just an issue with those files, but im too stupid to know what that issue is
i can send a photo of the arm 11 exception error message if need be obviously
edit: i didnt realise im meant to rebuild the romfs and exefs in pk3ds holy fish i need shot in the forehead no wonder that never worked before, ill try the rebuilt romfs and exefs to see if they work instead, my bad for being such a moron