This is a complete Glass and Frame Assembly. Includes LCD Screen, Glass, Digitizer, Frame, Home button and Ear Speaker. Simply unplug your broken assembly and plug this one in.
Here is a video that was made for the Assembly without the lcd. The procedure is basically the same except with this product there is no need to swap over the LCD since this part comes with it.
Note: The video shows an iPhone 3G but the procedure is the same for 3GS.
Click
here for a higher quality version.