QUICKLOOK SNOW LEOPARD:
To set any of these, go to terminal and enter in the code for whichever preference you want to set. Remember, to reset the setting to its default value, just change the "1" at the end to a "0" (or vice versa). Restart Finder for apply.

Enable "X-Raying" Folders with QuickLook
This one is pretty cool. It lets you show the contents of folders when QuickLooking them.


Change CoverFlow Background Color
Color value is in RGB. The code below will set it to white, as an example.


Enable QuickLook Animation Slow Motion
To use QuickLook you normally just hit Space. This just lets you press Shift-Space and have the animation go slo-mo. Useless but hey.
Hide QuickLook Window When Finder Isn't In Front
By default, if you have QL open and switch to another app, the QL window stays visible. This changes that so that if you switch to another app, the QL window disappears.
Keep Playing Icon Previews Even When The Icon Isn't Selected
If you're playing a movie using the "in-line preview" in the icon, by default if you select something else it stops playing. This lets you keep playing that in-line preview even when the icon isn't selected.
Keep Playing Icon Previews When Scrolling
By default if you are playing an inline preview, if you scroll down it will stop playing. This allows it to continue playing.
Enable In-Line Previews For ANY Icon Size
By default, you can only do those "in-line previews" when the icons are set at a certain size. This lets you do them at any size. (Change the "0" to any number 0-512.)


Show Frame Rate in CoverFlow
Self-explanatory.

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