For me, Pokemon Colosseum NTSC doesn't work (shrunk or unshrunk). I get the message an unknown error occurred. Also, the Pokemon Colosseum Bonus Disc NTSC displays a yellow error screen (unknown error) when starting up. Whoever got it working, please post more information about your configuration.
BTW: Launching multigame discs from Waninkoko's launcher fixes the incorrect save file name issue for multidiscs.
Unfortunately, Waninkoko's hit Z to reboot into hacked mios option doesn't work for multigame discs, I just get dumped to the old gcos app, which doesn't work. Maybe if he gets the hacked mios 100% compatible this could work eventually, but he needs to add a new option for rebooting multi-discs with the offset set to whichever game you chose in the meantime.
Also, I can't get pal games to output video correctly, but I don't know if Wan's installer downloaded the english version mios from Nintendo. If someone could send me a wad of mios v8 pal (if it's different than the us version), I'd be appreciative.
Edit: Also, the first multidisc I burned doesn't work with Waninkoko's launcher, but it does work with wiigators, I think it could be because I might have created it with an older version of the multidisc tool, so I hope waninkoko reads this thread and fixes it or releases the source to his app. This was initial bug wiigator had already fixed, so I'm surprised waninkoko's app had the same bug.