To extract the skin you will need 7zip, or winzip
1.Once you extract the file, Browse to My Computer > Local Disk C:/ > Program Files > RocketDock > Skins.
2.Paste the skins folder at said location.
3.Right click on the dock, and select "Dock Settings."
4.Select the "Style" area 5.On the drop down menu labled "Theme," select "Skin name here"
6.Click "OK."
7.Enjoy your new RocketDock theme.