Major thanks for the help, I got the latest Minus Max beta working perfectly.
Second, d4mation, I'm interested in patching in the Classic Expansion Pack, but I am completely in the dark as to how to go about it. Do I just get the ISO builder prepped normally, then follow CEP's provided instructions, or are there steps I should be ignoring/adding? I'm also not clear which GCT file I should be specifically referencing when changing the BAT file's value, RSBE01, RSBE01_CustomStagesEnabled, riivolution or the cumulative total. To expose my programming illiteracy, I've got pretty much no idea what lines I'm supposed to be adding to the BAT file. I look in that and I feel like I've got wires to a time bomb in front of me. I'm paranoid about deleting or adding any lines for risk of screwing up the process. I know you were doing this with Brawl+ and not Minus Max, but I have to imagine it's the same principle with different dressing for -, Minus Max, Balanced or Project:M. I'm just missing the principle.
All you need to do is make sure that the stages and music are being patching in as well as common5.pac under the System folder, I believe. I'm pretty sure all mods copy in common5.pac under the .BAT like normal, so you'd just need to use the lines of code I wrote as a guide to have the same folders be copied in for Minus Max. Just add in those lines of code to the .BAT like I posted above (But modified for Minus Max) after copying the Classic Expansion Pack files over top of whatever mod you're using and you should be fine. Alternatively, you could use/look at the .BAT I made to patch in the Classic Expansion Pack for Brawl+. If you take your .BAT for Minus Max and add those lines in wherever the Minus Max section is, it should work just fine. Looking at the code for Minus Max should show you how it needs to be formatted.
With your .GCT, the Classic Expansion Pack download actually includes pre-made .GCTs for popular mods like Brawl+ and Brawl-. They are in a folder called "Pre-Made GCTs for Brawl Mods" and just copy that into your folder like normal. However, you'll need to use
GCT Editor to disable the File Patch code as it will just freeze up your game as it is not needed and will try to reference files on your SD Card that may or may not be there.
If Minus Max is fundamentally different from Minux (I have no idea), then you'll have to take the .GCT for Minus Max and copy in the code for the Classic Expansion Pack which is is named as "Codeset.txt" in the "Classic Expansion Pack 5.5 with PM+Brawl- stages" folder for the Classic Expansion Pack.
Remember, you can always test your .ISO/.WBFS in
Dolphin. However, it may just be easier to put them on a WBFS drive to run directly on the Wii to test. I doubt you'll break it.
EDIT: Also, is there a way to change a game's ID in Wii Backup Manager? Basically every program out there requires a drive formatted to WBFS, and although my games are WBFS files, the USB Drive is formatted to FAT32 for compatibility reasons, and I don't have the space to backup all its files just to format it to WBFS temporarily for those programs' sake, or any other externals.
As far as changing the Game ID in Wii Backup Manager, I have no idea. The .BAT changes the Game ID for you according to the mod you choose. Theoretically, I suppose you could throw whatever Game ID you wish in there.
I could be wrong, but I believe you will need to use a WBFS formatted drive to load Wii game backups, I'm sorry.
I'll be busy the next few days, but if you can't figure it out I'll be happy to help you.