To use the visual style mentioned in my previous post (and others that you find interesting), you’ll need to patch your uxtheme.dll file. There’s a manual process, but there are some tools out there that automate this.
For Vista, I recommend vUXTender.
For 7, there aren’t any patchers out, but there’s UxStyle Core, which installs as a service instead of patching the files.
EDIT: I had problems using UxStyle Core, but I found this fix (need to run both lines separately in Command Prompt):
sc config uxpatch group= “File System”
sc config UnsignedThemes group= UIGroup