In Desktop mode, add the game to Steam and choose Proton 8 for compatibility, run it and download the .NET framework. Install Protontricks through the Discover store in Desktop mode, then run the .NET installer with Protontricks, and use linksawakeningdxhd as the prefix. After that, the game should be able to launch through Steam.
I think I'm in the correct prefix and i'm trying to install dotnetdesktop7 (the most recent package available), the install wizard comes up two times and says the installation was successful, but I'm still getting the prompt to download missing files when I try to run the exe in proton 8. I'm sure someone will put out a step by step guide soon, but could you let me know if I'm close?