You need this to work:
META INJECTOR v1.2
1- Download my new tool:
MetaInjector-v1.2.zip
2 - Go to your PAZ and put inside your "files" folder,
ONLY the customization
boneparamdesc_yourclass.xml for each class you want the mod to work, like this:
3 - Do a backup of your pad00000.meta file just to be safe.If anything goes wrong, restore it.
4 - With your files in place, run the MetaInjector.exe and see if you don't get any error messages.
5 - Once it finishes. Move the files from the "files" folder, back to the root folder of the game, or whatever place they were before.
If you get error messages, try moving your entire PAZ folder to your desktop, and then running the MetaInjector.exe, and if it succeeds this time. Move everything back to their place.
If you decide not using the mod again, run the mod-uninstall.bat, otherwise if you delete the modded files, the game won't know where to look for the files and it will crash.
If you have questions, let me know