In the Guide at the top of the page it says this:
02 - HOW TO ADD A SKIN
Most skins come in a .zip file. You must extract the file using winzip (which can be found at
http://www.winzip.com) to:
C

Program Files\Sports Interactive\Football Manager 2005\data\skins\.
This should add a folder with the title of the skin you want to use into C

Program Files\Sports Interactive\Football Manager 2005\data\skins\.
If there is no folder for that skin then you have done something wrong and the skin will not work!
whenever i extract a skin it doesnt create its own file and so its clear im doing something wrong. only thing is i dont know what it is!
someone please help