I'll try to explain it. Please visit the
http://joy.sophics.cz/clocky.htm and click on the link "Clocky online
documentation". Browse quickly through the first paragraph that
explains what Clocky is about and then check the "Features" and also
"Configuration" links.
The SetClock screenshots at http://joy.sophics.cz/setclock/index.html
are also quite explanatory - for example check your setting in the
"Mode:" option of Keyboard Settings dialog. If you have anything else
than "original" there you use Clocky's internal keyboard table. Note
that these tables (Clocky contains two independent tables) are freely
editable with a WYSIWYG editor - see the Keyboard layout editor
screenshot..
If you have more questions just ask me.
Petr