Mask to reveal preloader and mask to hide preloader upon load

Hi all, can anyone help me in regard to a mask over a preloader of elements.

Ok I have a preloader all set up, this includes a logo, a notice, i.e please wait loading in progresss, a load bar, and a percentage reading.

All I want is a simple wipe effect using a mask, which is very easy to achieve, I have done so already. But I am unsure in how to hide all the preloader elements, and how to use the wipe to reveal all elements on the stage / timeline. I have the wipe setup using two layers, and decided to place these inside a movie clip and place the movie clip on the timeline. But now I am stuck in what to do next.

As when everything is loaded I want the wipe to hide the preloader and move onto the design aspects.

Does anyone have an idea how to achieve this?