Window Blind Themes?

I don't remember where exactly they are but here's how I found them on my desktop computer. I downloaded picasa3. When picasa finds and categorizes all your pics on your pc, the windowblind file pics showed up. I just used the open containing folder option and was directed to the files location. Then backed up the themes from there. I am away from home on my laptop right now so I cant just check quick for you. I can tell you that some themes were in different locations depending on if they were originally downloaded in zip form.
Maybe someone has the quick answer, but this is how I found them and backed them up myself.