Delaney: no prob in being a n00b as long as you're willing to learn =P
to answer your last question, use the SELECT key in GMenu (reading the doc from the sourceforge page won't hurt either) and you will be given a menu which lets you manage menu sections and shortcuts.
If you have any problems doing this, please read the doc at least one as all your answers can be found there =) and of course any other issues just post here.
don't be affraid to break the device, unless you play around with firmware flashing, it is highly unlikely to happen.