There seems to be bugs with the widescreen activation code.Ty i fixed it.
Now i have 2 problems. Quite more important than this one :
On my O3DS, widescreen mode doesn't work (i'm retrying to dump the .cxi right now).
On my N3DS XL, every games launch with Widescreen mode (even TWLmenu++ launch as widescreen).
I followed everyting carefully, i don't understand.
Please disable it for now.
Also, to fix the N3DS XL issue, delete "TwlBg.cxi" at "sd:/luma/sysmodules/".