Custom 7 Authui.dll !
Additional Authui.dll resource info:
Windows 7 Logon Editing Guide
Custom Authui.dll sample:
Windows 7 Logon Screen Glass 32 Bit and 64 Bit
Edit logon GUI:
Logon WorkShop R2 (FreeWare)
Logon Workshop, Customize The Windows 7 Logon Screen.
Background Change:
GUI: Windows 7 Logon Background Changer
Command-line:
REG ADD "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Background" /v OEMBackground /t REG_DWORD /d 1 /f md %windir%\System32\oobe\info\backgrounds\
Copy JPG file with size less than 256 kb in %windir%\System32\oobe\info\backgrounds
folder and rename it to backgroundDefault.jpg