Easy refactoring to foxy fixtures?

Foxy fixtures (http://ryandaigle.com/articles/2007/10/26/what-s-new-in-
edge-rails-fixtures-just-got-a-whole-lot-easier) are great for new
projects, and I'd like to refactor fixtures in existing projects to
make them foxy, but find it quite a chore. I'm considering a simple
plugin to ease this task; has anyone already taken the effort to do
something like this?

Thanks,
Bruz

Just to follow up, I wasn't able to find an existing plugin or code
snippet to help refactor old fixtures to make them foxy, so I wrote
plugin myself. Here's a post describing it:
http://edgenic.com/2008/06/11/foxify-fixtures-plugin-refactor-those-old-fixtures-to-make-them-foxy.