Boot Editor is a free tool for Windows XP that changes the loading screen operating system however you want and you can add new or modify existing screens, and everything is very easy to do.
Before starting, the same tool will warn you that there might be problems, and clarifies how to solve them easily. However, this is something to keep in mind.
After the warnings and advice, you will see the customization tool, with a graphics editor and screen selector. From there we just have to adjust it to suit your preferences.
If you want to fully customize your operating system, Boot Editor will certainly not disappoint.