ok you need to chill.
i'm not a noob at this sort of thing, i've done things like this with my dreamcast back in the day (not the same exactly mind you) but i've been around and i have experience.
i have done everything exactly as described...but im still getting a dvd identify error. im gonna see how much detail i can describe in doing this..maybe i missed something.
i installed waninkoko's CIOS36_rev5-64-v1042.wad, through the wad manager. it was successful.
i un-installed dvdx (i had it installed before, for use with mplayer) and so then i re-installed it thru the advanced way, and chose ios249, and it was successful.
then i put the cios dvd dumper 1.2 on my card, and i dumped my SMG iso to my computer, thru wifi, 100% complete. i checked it through wiiui, and it verifies it was a working and good dump. title info, region info, everything fine. i put the backup-creator, and the common-key....in a folder, along with the iso. i opened a command prompt and used the command line way, and it made the backup iso, called "partition.iso" and it's 3.99gb. i opened up imgburn 2.4.2.0, and put a verbatim dvd-r in my dvd burner. i loaded up partition.iso in imgburn, and burnt it at 2x speed. 100% successful.
now at this point im thinking "ok well, if the cios dvd dumper worked, then...cios is installed correctly. and so the backup loader should work fine". so i loaded up the backup loader, and put in the disc, and hit launch game. and it sat there, made a couple squeaky noises like it was gonna read it, then it started making a repetative "chug-chug-chug" noise in my wii....and it says "dvd identify error" and went back to the backup loader main menu.
when that happened, i went back....and tried burning the original iso, just for the sake of trying. and that didn't work either. same error.
so now im starting to think....maybe its my wii's dvd drive. do some wii's come with different dvd drives, like the xbox 360 or something? i know i did everything....correct.
it's either gotta be the cios, or i have to use extractpartition instead of the backup-creator. BUT...if you already have v5 of the cios, u dont need v6 supposedly. and the backup-creator is supposedly the same as extractpartition. so..... *sigh*
im so stumped lol.