I don't really quite understand what you are asking.
Are you talking about trying to get your old LogonXP skins to work with the new LogonStudio for XP/Vista/Win7? If so, the answer is you can't really. Other than to pull the 100.bmp image out, rename it, put it in the appropriate folder, and use it as a background. All the other skinning on the screen (user name sections, etc) isn't done in the new version, it just loads the main background image.