Thanks for all your hard work, Sancho, for all the games you mod. However, after installing this mod as per instructions, I was getting error messages in Renpy. I was going to attach the text file with the error here, but then I figured out that the fault was with me, because I changed the name of the original scr.rpa file in the Game folder to scr.rpa_BAK (to back it up in case I needed to revert to it). I guess renpy doesn't care if you change the name of the extension like that, and that and your mod's version of the scr.rpa file being in the Game directory at the same time were causing the issues.
If anyone else did the same silly mistake as me, the solution is to remove the original scr.rpa file (or the renamed file, if you renamed like I did) completely, making sure that only Sancho's scr.rpa file is in the Game folder.
The gallery and game work flawlessly now. Thanks again, Sancho!