So if you run msconfig > boot and enable "no GUI boot" option, you'll see faded aurora instead of lonely green progress bar during boot process. How to substitute this aurora with an image of your own choice is described in the article above.
Here's the result of my tricks with ResHacker, imagex, PaintShopProX and mspaint, lol :
download link

Preview:

Just replace windows\system32\en-US\winload.exe.mui and don't forget to save/back-up the original file. My file is taken from RC2 (X86), but i think it'll work on RTM as well, it's only resource file. Don't forget to enable "no GUI boot".