UPDATE (12/29/2022): this guide has been updated to make sure HMM runs! I also have a video. I guess many of the people who have tried adding mods to Sonic Frontiers on Deck have had trouble. And up until this point I’ve had no idea how to help troubleshoot the various issues they’ve encountered. Fortunately SolarNyan came to the rescue with an updated guide. I’ll explain their steps here with pictures and videos.