Steam Deck OLED - replacement textures do not work

Hello! I have been trying for a couple of hours to get the replacement textures working - i am just looking to tidy the UI up, have Xbox button prompts, and have the JP Clarissa back in. I have used the texture pack here - https://gamebanana.com/mods/590158 - which is taken from the files on here. I have tried everything i can think of, and followed the install instructions on here, PCgamingwiki and Gamebanana but nothing works. The ini file matches exactly as per instructions, as does the folder structure. I've even tried: - Changing the name of the textures folder to something else - Using all variations of textures\load textures/ etc i can think of in the ini - Having the new files in their separate folders within textures/load - Copying them all so they just sit in the load folder with no other folders - Both of the above at the same time I am on a Steam Deck OLED, latest version of Steam OS. Game is installed under Proton 9.0-4 and i used the Outrun2006Tweaks 0.6.1 download. I did not install it into a Program Files path as the instructions said not to. I've only had the Steam Deck a week and know nothing about Linux gaming. The game itself was very easy to setup using the instructions online and plays perfectly for me, but the textures just aren't working. Please can someone help? Not sure what else to try!