Sorry for the necrobump but for anyone still stuck on this, I found a way around the 001 unauthorized error.
Some people were mentioning using Hermes cIOS. Do not use it. This works even on d2x.
It has worked for several mods that I have tried.
You will need:
- Windows PC
- Wii Backup Manager
- Wii Scrubber
- 7z linked in this post.
Step 1. Get your the premodded WBFS/ISO etc. Some modders release them already pre-split by Wii Backup Manager, which usually is a set of two files, a .wbfs and a .wbf1. Put these in a folder inside of the wbfs folder on your USB drive.
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Step 2. Use Wii Backup Manager to convert the split WBFS back to ISO. Save this in a folder you will be able to access later. Wait for it to complete.
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Step 3a. Usually the versions of Wii Scrubber floating around online will come with MakeKeyBin.exe, run it and follow what it says. If you've already done before this ignore this step.
Step 3b. Run Wii Scrubber.
Step 4. Download and extract the 7z file attached in this post. It contains bi2.bin, I'm not sure what it does but you'll need it.
Step 5. Open the ISO you created using Wii Backup Manager, and open it in Wii Scrubber. Locate bi2.bin and right click on it. The option to replace it should show up. Replace it with the bi2.bin in the 7z you downloaded.
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Step 6. Press the trim (not scrub) option after it reparses. Save the ISO somewhere that you can access later on.
Step 7. Go to your USB drive and delete the folder containing the untrimmed version of the WBFS.
Step 8. Add the trimmed ISO to Wii Backup Manager, and transfer it to your drive. Wait for it to finish.
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Step 9. Eject the drive and put it in your Wii, use your backup loader of choice but I will be using USB Loader GX.
Select the trimmed game and press Settings > Game Load and make sure Game IOS is "Use global". Boot the game and it should actually boot.
I use Feh's port of JD23 and another mod, JD Starlight and both were not working before this.
Before I went through with this process, I did update to the latest d2x cIOS, being v11, but I don't know if that in combination with the bi2.bin and trimming made it boot. But feel free to test on v8 or v10.
Some mods work fine without this, like JD East and JD Japan. Hope this works for some other problematic mods.
Credit goes to AlessioDi (bi2.bin) and x-x (method) for this in the Feh's Server/Hub Discord.