To use those themes you must apply the default windows aero theme
then if you already have a windows 7 folder here

      C:\Windows\Resources\Themes

just delete the Windows 7 theme and paste one of those in this folder to

      C:\Windows\Resources\Themes\Windows 7

and rename it to Windows 7.


Note: To iconize your normal taskbar theme you have to set the MinWidth to 45.