How to remove shelf beneath dock?

Question

Under previous OS X releases it was easy to remove the shelf beneath the dock leaving just icons and little white lights under those icons in use.  To do that you would:
How to remove the Leopard Dock shelf
Got to:
Macintosh HD
System
Library
Core Services
Click on Dock.app and hit Show Package
Contents
Resources
Remove these graphics:
frontline.png
scurve-xl.png
scurve-sm.png
scurve-m.png
scurve-l.png
Copy them to another folder
then delete them
Now go to Applications/Utilities/Termarinal App
Type:  killall Dock
Now when you burrow down to the png images in the Resources folder you can find/remove the frontline.png image but the "scurve" images are no longer there and Apple has probably renamed them something else.
The shelf is one of the most annoying aspects of the desktop.  It isn't cute or clever but detracts for the overall look and takes up far too much screen space at the bottom of the page.
Has anyone figured out which images must now be deleted from Mountain Lion to effectively remove the dock shelf?

Answer 1

Here's the answer:  A free application called TransDock X from nothinggoes dot com.  Go there, download, install - you'll have to open your preferences -> security and change Mountain Lion's default restricting you to using only 'authorized' (i.e., App Store only) applications to "any" applications then run TransDock X. 
Does a beautiful job.  Removes the shelf entirely.
You may wonder why I dislike the shelf so much.  I run my Mac Pro using two 30" Cinema Displays.  That's 5 feet of display.  When the shelf is displayed I can't figure out what apps are running because the little white light beneath them is now so close in color to the shelf itself.  AND, the shelf simply takes up too much screen space, is distracting and very annoying.  Remove it and all you see are your favorite or most used Dock app icons and if any are in use there is just a little bright light shining beneath them.
By using "spacers" I can display my Dock apps in groups - systems apps like iTunes, Mail, App Store, Dashboard, Finder, Launchpad as one group then a space and the next group: EyeTV, Media Editors, Toast, Apperture, Final Cut Pro, and others followed by another spacer and another group for TextMate, Pages, FireFox, Safari, SeaMonkey, etc.
Apple should give the user the option of many screen features including the ability to remove the shelf. 
BTW - here's how you add spacers to your Dock as well as a Recent Applications Stack or Grid:
Add Spacers to the Dock
If you want to divide the applications in your Dock into groups, the best way is to add spacers. A common method is to create "fake" applications with an invisible icon to fill the space, but that is a bit inelegant. A much better way, available in Leopard, is to use a Terminal Command. Each time you run the command it inserts a blank "space" into your Dock, which you can then drag around to where you like.
Start by opening up Terminal, located in Applications/Utilities. Type the following line and then hit enter:
defaults write com.apple.dock persistent-apps -array-add '{tile-data={}; tile-type="spacer-tile";}'
For the changes to take effect you will have to restart the Dock, either by logging out and in again or by running the killall Dock command in the Terminal. The spacer appears at the end of the icons that are permanently in the Dock. You can then drag it along to where you want it.
Dock Spacers
The above command inserts the spacer on the applications side of the Dock. To insert a spacer on the right hand side, use the following command:
defaults write com.apple.dock persistent-others -array-add '{tile-data={}; tile-type="spacer-tile";}'
As always, you will have to run killall Dock for changes to take effect (open the Terminal app and type: killall Dock - the Dock will disappear and come back up with the changes. To add multiple spacers just run the command again and again. Note that you can use the "up" arrow in terminal to automatically enter the last run command.
If you want to remove a spacer, treat it like any other icon in the Dock. Either drag it off and let go to get a nice puff of smoke, or right-click on it and choose "Remove from Dock".  And, of course, you can drag spacers throughout the Dock line to separate groups of apps.
Add a Recent Applications Stack
You can add a Recent Applications stack to the Dock. To do so, open Terminal and type this command:
defaults write com.apple.dock persistent-others -array-add '{ "tile-data" = { "list-type" = 1; }; "tile-type" = "recents-tile"; }'
After that, type killall Dock in the Terminal to restart the Dock and see your new folder. This is a great little Dock icon for using an app you used recently but is not generally held in your Dock.
Enjoy!