I've uploaded a FC6 (Zod) image for Parallels Desktop yesterday. You can find it on my blog. I also have a step-by-step install process screenshot series. For more images I also just noticed someone else was also providing pre-built images. Just didn't have FC6 yet, but has a lot of good ones.
You can now also watch a complete install screencats at http://tekartist.blogspot.com/2006/11/screencast-fedora-core-6-install-in.html
