Disable ALL password prompts in Finder
Do It Yourself: Option 1
Open a Finder window in Column View. Choose Go To Folder from the Go menu. In the sheet that comes down, type /System/Library/CoreServices. You'll see two Finders there. Click on one of them (just one click!) and make sure it doesn't say &quot;Classic Application&quot; in the preview pane. If it doesn't, then that's the one you want. Hold Option and drag it to the desktop (because you want to duplicate it).
Now rename that app to RootFinder or something. Move it to your /Applications directory. That's all the setup; the only part you have to repeat is from here on in.
Open the terminal. Type:
    cd /Applications
    sudo open -a RootFinder.app

Enter your admin password at the prompt. Note that your desktop picture will change, and a new default Finder window will pop up. Your original Finder windows or other running apps won't be affected, however. Now, you cannot move files from one Finder to the other, but as long as you're using only the root finder (opening new windows will open them as root finder, obviously), you have full root access to the bowels of your system and you can browse directories and copy/move files much more easily.
To get back to where you were, open the Terminal again. Type ps auxc | grep Finder and then sudo kill [PID] and enter the PID of the Finder. The Finder will automatically relaunch in your original account, and your desktop picture will change back.
Source: Create a GUI Finder with root access
Third Party App: Option 2
Would you be interested in LaunchAsRoot?
From their website,
How to use
Drag the application (or a document) you wish to launch as root on top of the LaunchAsRoot application icon in the Finder. You will presented with an authentication dialog. Enter the name and password of an administrator to allow the application to be launched by LaunchAsRoot. LaunchAsRoot quits after launching the application.
How to use Service:
Control-click on the application (or a document) in the Finder and select &quot;Launch As Root&quot; from the Services contextual submenu. You will presented with an authentication dialog. Enter the name and password of an administrator to allow the application to be launched by LaunchAsRoot. LaunchAsRoot quits after launching the application.