Two Questions

I’m looking to use a theme which doesn’t display codec info when playing a new clip.  Can anyone recommend to me a theme which would fall under this category?  Also how exactly do I go about switching themes?  I know you can’t switch via the files being on an external hard drive, so could someone please give me step by step directions on how to switch themes.  Thanks.

http://community.wdc.com/t5/WD-TV-Live-Hub-Themes/Video-Tutorials-nOOb-Centeral/td-p/283846