How to restore proportional window resizing in Snow Lepoard's Expose

Update August 2011: Unsurprisingly, this hack doesn't work in Lion. Thankfully Mission Control is vastly better than Snow Leopard's Exposé, albeit still much less useful than the old Exposé. Oh well.

For heavy Expose users, Snow Leopard's expose is utterly worthless due to the unintuitive grid layout, which Apple considers a feature. This hack restores OSX Leopard's proportional resizing and positioning of items when Expose is invoked, and means I can once again identify Expose windows without squinting at the screen!

Note: Copied wholesale from this macrumours thread - thanks to user miknos for putting it together.

Instructions

1. Download the fixed Dock.app here. Extract to Desktop.
2. Create a new folder in desktop called OldDock.

3. Open terminal and (changing username) type:

   sudo chown -R root /Users/USER/Desktop/Dock.app
   

   type your password if necessary

   sudo chgrp -R wheel /Users/USER/Desktop/Dock.app
   

4. Now copy/paste everything. Don't forget to change to your username:

   sudo killall Dock && \
   sudo mv /System/Library/CoreServices/Dock.app /Users/USER/Desktop/OldDock/ && \
   sudo mv /Users/USER/Desktop/Dock.app /System/Library/CoreServices/
   

Restart and Enjoy!

To revert, just put the original dock.app (now in the OldDock folder) on the Desktop, and repeat everything.