"Importing" .upk to UDK

Well according to some experts out there, it's impossible to actually import a .upk to an Unreal Development Kit (UDK), but it can be open it. What it meant was that (took me a long while to understand it), once the file is copied into where the UDK is installed (usually it's in the C drive, outside the Program Files, I copied mine in the folder: C:\UDK\UDK-2010-02\Engine\Content), start-up UDK and it'll in the Content Browser.

However, though it's in the content browser, it won't show a thing when clicked on, not sure why. It can be fixed by right-clicking the package and select "Fully Load". After a short while, the textures and stuff will appear in the browser...