CMS Made Simple Forums

Try this one
http://www.opensourcecms.com/scripts/de ... e%20Simple
although sadly it's an out of date version (1.10.3) but at least you can play with the admin area. I've contacted them to ask how to update it.

You could also INSTALL a complete working environment on your computer:

http://bitnami.com/stack/cms-made-simple/installer

Just did this as a test on Windows and seems to work fine.