I had a night spare, so I made this nice Bash Shell Script. It generates shell scripts that will extract a color scheme, domino theme, dekorator window decoration, kicker background and wallpapers AND set them for the user as well. Hopefully this will make packaging and distributing themes easier for the creators, and installing the themes easier for the users.
http://www.roket-productions.com/opensuse/themepackager (just ignore the fact it's in a directory called opensuse, I use that for all my linux stuff)
To use it, make the file executable (with a command like chmod u+x themepackager), and then run it from a console.
Have fun ;)