The icCube's application structure allows to add several extra items, such as a JS Action. Is it possible to use this JS Action (or another item) to link to an external HTML, to - for example - show a help file/ quick reference card?
For opening a new page simply add the following to the body of your JS Action:
window.open( 'http://www.google.com', '_blank' );
is going to open Google.
Hope that helps.