Some hurdles on my first skin

I'm working on my first skin which I want to enter into the skinning contest. I'm having a few issues with certain things I want to do with the skin.
The basic design is a circle UI with a single button the centre. Clicking the button causes the button and a centre piece to fade out revealing the main player area in the bg. I also wanted the detailing on this bit (i.e. buttons sliders and info) to fade in after the centre piece was gone. For now I've made a working solution which involves using 2 interfaces. The first one simply has the main UI image and the button, the button is set to load interface. When it's clicked, the next interface loads, and that has an animation which starts off with the same image as the prefious interface, and it fades out. There's also a copy of the main bg without any details, which then also fades out, to simulate a fake animation of the details coming into view.
I have an example of the animation here to explain it better:
As it is, the skin works ok, but ideally I'd prefer to just have one interface.
What I need to be able to do is have the activation button hide both itself and the cover piece at the same time and activate the animation.
Is it possible to do that?
The basic design is a circle UI with a single button the centre. Clicking the button causes the button and a centre piece to fade out revealing the main player area in the bg. I also wanted the detailing on this bit (i.e. buttons sliders and info) to fade in after the centre piece was gone. For now I've made a working solution which involves using 2 interfaces. The first one simply has the main UI image and the button, the button is set to load interface. When it's clicked, the next interface loads, and that has an animation which starts off with the same image as the prefious interface, and it fades out. There's also a copy of the main bg without any details, which then also fades out, to simulate a fake animation of the details coming into view.
I have an example of the animation here to explain it better:

As it is, the skin works ok, but ideally I'd prefer to just have one interface.
What I need to be able to do is have the activation button hide both itself and the cover piece at the same time and activate the animation.
Is it possible to do that?