You would like some custom background.
The standard background wallpaper on a Winpe Boot-CD is called Winpe.bmp.
Convert the Wallpaper you want to use in bmp format and rename it in Winpe.bmp. Locate the original Winpe.bmp in your source directory and exchange the original file with your custom file.
After this step you can create the Iso-image for your Winpe-bootdisk (for example with oscdimg) and burn it on CD.
About the Author
Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux in different European countries and different European languages. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform where he is one of the most important contributors and the main developer.