You may need to get a gc controller, but give this a go.
Save to sd:\ rename to boot.elf
Do the letterbomb again and see if it load wiimod or cboot2 then wiimod.
replace sd:\startup.elf with that
rename wiimod sd:\boot.dol to sd:\star.dol
run letterbomb again.
Also you can try the same thing with MMM. Just put the mmm boot.dol on sd:\ and letterbomb it. If the wiimote works, reload ios254, then it should reload via cboot2. Then you can install 1OS236 and hbc wad. If mmm loads without wiimote you should be able to edit sd:\mmmconfig.txt to autoload another ios, say 57. Those files are in the modpack of the any wii guide, chapter 2.