Offline Personal Wiki Software?

I'm attempting to make a mythos/guide to a story-world that I have developed, and I like the Wiki Software used on many sites (Wikipedia being the most obvious example), but all of the searches for an offline wiki lead me to online, server based stuff which is all entirely greek to me (Seriously, I know more about how to fly a commercial airplane then how to get stuff onto a internet server), and I only need the wiki for myself.

The closest and only thing I've found is a program called Notebook, which is nice, but the entire thing is bareboned and only supports GIFs. >_>

Can you help me out, GFF? I don't need a giant wiki, just something small that I can work on offline and on my computer. It would be great if I could even just use templates and fill in information at my leisure... but right now I'll settle for pretty much anything.

Jam it back in, in the dark.

Uh, no need to fight guys. Anyway, just to clarify I have WinXP on a Laptop.
I'll try out your suggestions though, Merv and Roph.

Yeah not that I have anything against Mac or anything, but I'm a major gamer d00d, so Macs were kinda out of the running

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Both of your guy's suggestions were nice, but they were so bloated... Notebook is going to have to work for me for right now.

This thing is sticky, and I don't like it. I don't appreciate it.