OK, OK, you’re right – if I’m going to cover customizing the loginwindow of Mac OS X then the least I can do is cover Windows as well. Because the registry is basically a bigger, more monolithic version of the defaults domains, we’re going to do pretty much the same stuff at the login screen for Windows. First, open the registry editor (regedit) and browse to HKEY USERS .DEFAULTControl PanelDesktop Then edit the value for wallpaper, typing in the path to the image you’d like to use. To set it as tiled add TileWallPaper and set it to the integer 1 or to stretch add WallPaperStyle and set it to the…