Windows 7 Login Screen Change

Do you want your own screen in Windows 7 here is the process to do so.

You will need make a Registry Addition to do so.  Please be careful and back-up your registry.
steps are on this site
http://www.sevenforums.com/tutorials/4230-registry-backup-restore.html

You will nee to modify the following key in the registry
to do so From the start menu or a command prompt enter REGEDIT

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
CurrentVersion\Authentication\LogonUI\Background]

"OEMBackground"]
The OEMBackground entry needs to be changed to the following dword:00000001

You will need to create a few new folders steps below
The change you will need to make are here
2. Now, head over to the following folder:

C:\Windows\System32\oobe (“C” is your Windows Seven Installation drive)
3. Here, create a new folder named Info. Again, create a new folder inside the Info folder and rename it as backgrounds.

4. Copy your favorite image file to this folder and rename it as backgroundDefault. Note that the image must be in JPG format and the size should be less than 256 KB.

5. You are done. Reboot your system and see the change.

The following files (sorted by width-to-height ratio) are supported in C:\Windows\System32\oobe\Info\Backgrounds folder:

* backgroundDefault.jpg
* background768×1280.jpg (0.6)
* background900×1440.jpg (0.625)
* background960×1280.jpg (0.75)
* background1024×1280.jpg (0.8)
* background1280×1024.jpg (1.25)
* background1024×768.jpg (1.33-)
* background1280×960.jpg (1.33-)
* background1600×1200.jpg (1.33-)
* background1440×900.jpg (1.6)
* background1920×1200.jpg (1.6)
* background1280×768.jpg (1.66-)
* background1360×768.jpg (1.770833-)