Show One Thumbnail in WordPress Native Gallery

I have everything working with my combination of WordPress’ native gallery and jQuery Colorbox, but it’s lacking in terms of presentation. I want to be able to display one single thumbnail in the post for a gallery that is then loaded using jQuery Colorbox when the single thumbnail is clicked.

I have seen others mention that this can be accomplished by hiding the other images from display. But I have seen no reference on how to go about doing that. Is this accomplished using CSS modifications applied to the native gallery or is this done on the jQuery Colorbox side or is it a modification external from either of these elements? A little help would be appreciated. I have search everywhere for a solution to this problem.

http://wordpress.org/plugins/jquery-colorbox/