well looked into it and I find it rather difficult because you need an common-key.bin file (google may have the answer to that).
other than that it's just take a what, take a rom, take autoinjectuwad and make sure you have the bin file. than look here if it can or cannot be injected
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seeing that little samson is not in it I suggest that you use smb3 or kirby's adventure as wad
please note that I didn't try it myself as I am afraid of bricking my wii with this
tell me how it turns out