How to install: 1. Right click the SADX shortcut and click "Open file location". 2. Extract the files from the zip folder and replace the ones in the "system" folder. Note: If done correctly, the mod should make Sonic have an orange blur effect. This is unintentional and is something I just don't know how to fix.
Could you make this run with the SADX Mod Loader? Also, to "fix" the orange trails for Sonic, you could just replace him with Shadow. I think they're too connected in the code to have separate trails since they're the same character with different models and textures and Metal doesn't spawn with Tails.