I think Sal's mod should be just an optional download. I mean sure, someone can implement it in the game but in my case, since its more flexible this way, is that it'll be an optional mod for the game. I mean, if I feel like I want normal looking breast, I just copy the original assets, place them somewhere safe then replace the ones in the game with Sal's mod. And if I feel like going back to Glass' style, I just replace it again.
For me, it feels simpler to just change assets manually than to implement it into the game.
Edit: Also this replacing it manually, when done right, feels like it will cause less issues with the codes.