Just another Guide called VanillaGuide specifically created for Classic/PreTBC/Vanilla BlizzLike Private servers.
VanillaGuide aim to cover the hole for an in-game guide for Vanilla WoW. The AddOn features:
Well, thank you Joana/Mancow, you ruined my life with WoW, but I love you anyway. and here's the link to the REAL guide, from Joana itself (although it's not for 1.12.x but more a 2.3.x version):
If you would like to support this project, you may donate to our development fund via Paypal.
Any funds donated will be used to help further development on this project, by purchasing equipment, etc.
We are always looking for more volunteers to help with coding, customizations, etc, so feel free to contact us.