Lightbox customization

I'm in need of using Lightboxes instead of layers due to an existing bug in Storyline.

I have a several questions regarding the customization of Lightboxes.

1. Can you get rid of the BG layer that appears behind the lightbox?

2. Can you re-size that layer?

3. Can you get rid of the Red X that appears in the top-right corner of the Lightbox?

4. Can you set a trigger in an object in the lightbox to change the state of an object (button) in a different slide other than the Lightbox?

4. Is there a way that when you invoke the lightbox the audio in the slide does not stop playing, as it does in Layers?