I wanted to have a Windows XP style boot screen for Aurora so I made one. It has both dark and light, just change the "Alternate Splash Screen" option in the skin menu. This theme just changes the Aurora loading screen, so if you have a theme you already like, feel free to extract the XZP with XZPtool and just copy AuroraLoading.xur and the Images folder (no overwrites) to your preferred theme.
XboxXP.xzp