You'll need to make some changes to '/etc/preinit.d/b0000_defines'. Change the gamepath to '/usr/share/games', copy the games from '/usr/share/games' to '/var/lib/hakchi/rootfs/usr/share/games' and reboot your SNES Mini.
This will fix overmounting of /usr/share/games (while keeping original games), and you'll be able to write there. After that just FTP your files so the injected folders look like this:
View attachment 101093
Well, anyone can. Just add the header/footer to ROM and edit .desktop and .png
It's easier to use Cluster's clovershell, just use Hakchi2 to dump the original kernel and flash the custom kernel. You'll instantly get access to FTP and Telnet after that. Easy-peasy.