If so you may post it here. If you are posting a guide that belongs to someone else, make sure that you check the legal section of the guide as that is where the majority of most authors put that kind of information. If they say it is ok to put the guide on other sites, then go for it, however if they say that it is strictly for one site, then please keep that in mind and don't post that particular guide.
And remember, if you didn't make the guide, leave all of the original credits intact, do not try to claim that you made it if you didn't.

In order to straighten out some ASCII art, you should use the code BB code otherwise vbulletin will simply mess it up. Good luck with the FAQ's and guides and I hope to see several authors here!