wow, you gotta think there is a solution so that you can use themes easier and on every wm you have.
wait, whats that, there is one! and yes, its freeeeeeeee too. at least my advice.
(i still wonder why i post here)

- go to freshmeat.net
- search for wmtheme
- click on the first project & download it
- go to a console
- untar & unzip wmtheme
- read the README file

now you are ready to install easily themes on every wm.