So, with Windows 7 RTM right at the corner, do you still remember Windows 7 Milestone 1? This awesome theme brings me back to these days when i was keeping trying every leaked version of Windows 7. The theme will turn your Windows 7 to a M1 style, which in my opinion is really nice.
If you have no idea how to apply themes in Windows 7, look at this first:
If you don't know how to replace system files when applying a nice theme, here is an article you might need: