I hope you looked up how the copyright laws work cause if you don't have permission to produce this guide (official or not you probably still need some sort of consent), you will get slapped with a lawsuit sooner or later.

That said, while I do wish you well I highly doubt you'll get many buyers. Regardless of what you think was missed in other guides, the reality is that all the information a player needs to complete the game can be found for free in many many places on the internet. Time is a huge factor here; the game is now old enough that all its secrets are essentially common knowledge. I'm afraid you missed the boat by about eleven years.

~DragonHeart~