http://h34nug3iwqjf2376fmmzdhgqivckzemcujmarlptfqeqtq7vya47yyad.onion/2007/09/05/katapult-faster-and-easier-access-to-your-applications-bookmarks-and-files/index.html
you sure this is not a spoiling exercise ;) Anyway, if you are used to some windows shortcut or other, you are free to change katapult’s binding using the KDE control centre, go to “Keyboard Shortcuts” (you can even search for it!), select the “Command Shortcuts” tab and give katapult any keyboard combination you please.