Does "ntlite" have the ability to change icons, change wallpaper and other things...
1) Icons I've never researched, but I would check if the proposed solutions tie into WinSxS because certain tweaking approaches, such as directly replacing the icons, could result in an SFC scan reverting them back to the originals.
2) Wallpaper solutions are here (
link1,
link2), and the best approach is to unset the Aero theme, add a custom wallpaper into the mounted image, then set a registry key to activate the wallpaper (or use a solid color background to save some steps).
3) A related question you might ask is to customize the splash screens (
link3) in Windows Setup and elsewhere.
4) The best recommendation I could make for those new to NTLite is to follow other people's guides (
link4) to quickly gain familiarity with the NTLite tool, Windows tweaking concepts, and to acquire the hands-on experience needed for better troubleshooting and experimentation. In other words, research things first, and don't recreate the wheel unless the results of the new method are expected to be better than available solutions.