How To Change the Login Background in Mac OS X 10.7.4

Changing the Mac OS X login background on version 10.7.4 is quite easy. Here's how:
  1. In the Finder menu, click Go > Go to Folder...
  2. Type: /System/Library/PrivateFrameworks/LoginUIKit.framework/Versions/A/Frameworks/LoginUICore.framework/Versions/A/Resources/
  3. Locate the file appleLinen.png, make a backup and replace the file with your customised PNG image.
  4. Log-out or restart your computer to see the changes.

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