My bad, let me fix that... Lain's mod won't work with the steam version at all without first renaming the file episode1.rpy in the mod to script.rpy. I have been looking at both versions too much last few weeks and had retested Lain's mod on the wrong version by mistake (I used it on a copy of the steam version which I had copied to another folder to unpack and compare)

. All versions have bugs on the alternate costume path (steam when you force elite content flag to True).
The mod I'm working on will:
-Add selection to replay halloween event from Holiday Specials after experiencing it in game
[Done]
-Add custom walkthrough based off Lain's walkthrough with additional flags (togglable on/off from options)
[Partial]
-Update gallery to be inline with steam version (with cheats to unlock/relock all; cheats togglable from options)
[Done]
-Make Uncensored patch togglable (in options)
[Done]
-Achievement List added to Main Menu only for steam version (with cheats to unlock/relock all; cheats togglable from options)
[Done]
-Elite content added back in for steam version
[Done]
-Fix for Alternate costume bugs in Elite content
[Done]
-Textbox style selection in options (Original 1.0.3 textbox & font, Solid box (from lain's mod edited to full width), default gradient)
[Partial]
Edit: added screenshots of achievements screen & settings