So far, I have three screens that are set up in the boot up/desktop process..
The boot screen, which replaces the windows logo(although still 16 colors, looks much better when not resized)..

The "default" desktop bg (which is seen when windows is loading settings)(also seen for longer than the one below when shutting down)

and the Desktop BG (which would be seen right before the GUI loads up)(and for a small moment when shutting down)

I tried to make it seem like a coherent progression, and the fact that the only difference between the "default" and "user" BG is a small message looks cool when loading up... since theres no screen flicker between the two it actually looks like some console is giving you status messages.. Also, the BG image itself and the top bar are both from my Mala theme, which work to integrate everything as well. The bar and BG are the same, and then "the logo dissapears and the GUI pops in" when MaLa loads..
I'm not sure if this is a new idea, so I'm putting it out there as one people might like to know about... it definitely helps to visually (and mentally) "replace" windows ...