I have been struggling in makeing mine and still cant get it to work, is there any way you can release the guis so they are editable like the icon bar?
It's better to write a custom one rather than try to make the default one have all the options everyone might want (though it would be good to include directory functionality to the overall system). I'm sure there must be a tutorial about doing so somewhere around here to help you out?
I also think that it's better just to make your own. For tutorials, you can check out this thread:
http://atticwindow.adventuredevelopers.com/tutorials.php?id=1
There's also another one but I can't seem to find it...