You've got to use a little ASL, but you can do it all from QDK
Go to 'Game Properties', 'Global settings' and click 'Edit Custom Player Commands'
Add a command in the usual way, so that it reads
command <help> helpdisplaytext <helpguide>
Leave that menu completely.
Now in the 'Text Blocks' menu make a new text block called 'helpguide' - put all the stuff you want in there...
Save & run - job done

Al