Hi Everyone. I'm curious as to how to install desktop themes. I've clicked on computer→desktop preferences. And there I found a theme manager. in there, all my themes are stored and changed.

I went to www.gnome-look.org. and there I got the tar.gz files for the themes. I was told that I could simply drag and drop them into the theme selector window and they get automatically installed but I'm not sure whatt that means or how to do it and that's where I'm basically lost. Could someone maybe walk me through the process and give me a hint as to what I'm doing here?