I've looked at doing this but the problem is the unseen variables. Looking through the code there are a lot of variables needed to trigger each scene. So to say you need to do this this and this for a particularly NPC, first you have to say you need to do this action when you talk to them but you can't do this action until you have done this action over here on another girl's section. Some of the hidden attributes like Samara's "Opinion: Partner Potential" I haven't even bothered to look and see what if any scenes they affect.
I'm sure it is possible to make the guide but I just haven't had the time to break down all of those attributes and triggers that would be needed to do it. I know what attributes you need to trigger whether Primrose becomes your girlfriend or friend with benefits. But I don't have all the possibilities to raise her "Like" and "Love" scores.
When it gets done it should be something with sections like:
Player Attributes: (All the things needed to raise those attributes.)
(Girl)'s Attributes: (All the things needed to raise/lower those attributes.)
(Girl)'s Scene: (All the attributes and triggers needed for these scenes.)
Secrets: (Where to learn each secret)
(Girl)'s Secret: (Order to reveal the secrets in)
But by the time Belle starts putting the end game (time limit) in the current format will be basically useless. So rewriting will become less of a good idea and more of a necessity.