Hi I'm trying to make an unattended copy of windows XP SP2 ... and i want to make it with OEM info and logo ... my problem is : when i browsed : unattended.msfn.org : iv read :"Create a new image with a pixel size of 180x114 (width x height), customize your logo to how you would want it to look, then save it as oemlogo.bmp. Its a good idea to keep it transparent so it blends into the color of the System Properties window!" http://unattended.msfn.org/advanced/cosmetics/oeminfo.htm My question is : i know that png and gif only support transparent bakground ... so how to make a bitmap ( bmp ) with transparent pakground to make my oemlogo blend into the color of system properties ?