Assuming you are using the ViX Image, the best way to install this skin (the current one is V3 as described in the post above mine), would be via the images own plugin feeds. Once installed you will then have to tell the image to use the skin by going into the skin setup page located in Menu> Setup> System. Sory I can't be more specific but I am currently not near a receiver to give more detailed instructions.
Also be aware this that skin will not work at all on images such as VTI and Black Hole.