I am not sure if this will be a solution, for now I am not able to test it myself (have no sdk by my side for now). This tutorial from Samsung is from 2011, a little bit older and not adapted to the new Android SDK or Eclipse. So maybe You have to try following:
Extract the zip file, there must be a folder "skins" and a subfolder inside "skins" named "GALAXY Tab". Copy this subfolder to You android sdk directory:
/platforms/android-9/skins/
But check at which target API You would develop, the folder "android-9" depends on which target api You need.
Now, restart Eclipse if it is open, and open Your AVD Manager. Select "New", there must be a category "skins", here You should be able to select the added Emulator and then You could build a AVD for this Galaxy Tab.
Try it, if it doesn´t work, I will try later if I am at home.