First of all make sure you have tortise svn installed just use google to find it i would post a download link but i am not sure if i can or not, and it's always mare rewarding when you find it yourself.
Once it installed, make a folder on your desktop name it xTV if you like and then right click it.
Select SVN checkout, and enter this:
https://svn.sourceforge.net/svnroot/xboxmediacenter/xTV into the URL path and select ok. or whatever it is for confirmation.
It's really a simple process.
OK Im dont know this soft never, in SPAIN this is not usually, but not a problem, Im downloading now this soft and take the xtv skin in a few minutes.