Well, here’s a cool little trick I ran across while trying to find a way to hide the menu and scrollbars in Mac OS X. This one is a Terminal hack that you can perform in Mac OS X Snow Leopard to get folders in Quicklook preview to show up with transparent covers. This gives you an “x-ray” style view of the icons of items inside that folder. Pretty neat. Here’s a little video on how to do it along with step by step instructions after the break:

Step-by-step
1) Launch Terminal (Applications–>Utilities–>Terminal)
2) Type in the following command:

defaults write com.apple.finder QLEnableXRayFolders 1

3) Control+Option+Click the Finder icon in the dock and select ‘Relaunch’ to restart the Finder.
4) Select a folder in the Finder and press the spacebar to open it in Quicklook.
5) The folder icon should now have a transparent cover and you can see the icons of items inside the folder

Secrets – The GUI Method
1) Go to the Blacktree Site and download Secrets
2) Install Secrets. Double-click the .prefpane file and say OK when it asks if you want to install the Preference Pane.
3) Open System Preferences–>Secrets
4) In the ‘Top Secrets’ section check the box next to ‘Show X-ray folders in QuickLook’.
5) Click the ‘Quit This’ button to quit the Finder.
6) Click the Finder icon in the dock to relaunch the Finder.
7) Select a folder in the Finder and press the spacebar to open it in Quicklook.
8) The folder icon should now have a transparent cover and you can see the icons of items inside the folder