Setting a key so that it acts like the windows key is easy:
edit the file /etc/X11/kb/corgi.xmodmap (you might want to keep a copy of the original)
modify the line:
keycode 130 = Super_L
add the line
add mod4 = Super_L
restart x or do xmodmap /etc/X11/kb/corgi.xmodmap in a terminal
and you have a windows key map to the left "kanji" key.
You can obviously choose another key (use xev to find its keycode).
What's the benefit? you can setup more shorcut for controlling the wm, launching app ...
for instance I'm trying fluxbox now and I have added in ~/.fluxbox/key
Mod4 Left :PrevWindow
Mod4 Right :NextWindow
Mod4 r :ExecCommand fbrun
reload the config and by pressing "kanji" + r it launches fbrun