The payload will be named the same as the otherapp payload you download from here.
Here are the files to use for a 9.2 NEW 3DS:
USA: N3DS_U_12288_8203.bin
EUR: N3DS_E_12288_8203.bin
JAP: N3DS_J_12288_8203.bin
Here are the files to use for a 9.2 OLD 3DS:
USA: POST5_U_11272_8203.bin
EUR: POST5_E_11272_8203.bin
JAP: POST5_J_11272_8203.bin
The files are found in /3ds/themehax_installer/otherapp
I'll add this to the main guide. Hopefully that helps .
Yea thats the one I thought it would be, no dice. I've got a N3DS XL on sysNAND 9.2 when I swap the file the splash image comes up but I get nothing on the bottom, not even a color :/ Also might be worth noting when I power it off after the failure to boot the shutdown menu pops up.