[ I will try to keep this list updated with any new themes that are released. ]
To use a theme you need to put the three files within the data folder. To unpack files in to SORRv5\data if you don't have one then simpley create it in the SORRv5 folder name it data and then put the files in there.
Go in this folder:
Example: C:\Games\Streets of Rage remake\dataTheme collection pack one includes 3 themes:The original themeThe Winter theme
& The Summer theme
Theme collection pack one download firedrop link: https://firedrop.com/b86072c3d4c6756e (under 1mb)Tutorial
To create your own theme just open up the fpg files and export them, put your own images on that image then put them back into the fpg file. The pixel size should remain the same.
Now we might start to see some more themes in the future.