I did the exact same steps and it worked !
I needed to put the save file in Dolphin to get it inside the Jp memory card file and I redo the thing to make colosseum read it again !
Thank you guys !
Another question, is it possible to do the same...
Hi everyone, I have the same problem as the OP.
I'm trying to make it work on a Wii with Nintendont.
I modified the Iso in the HeX editor and changing the values as same as in the tutorial that OP posted, and the Bonus Disc won't read the save...