You should know these things: To open the light room presets, go to the preset window, right click and press import.
Then browse and open this preset to get it in lightroom.
When you choose your photo just click the preset and the effect will be applied.
This preset will give your photo the effect of the famous political vector art This preset was made in Lightroom version 3.6
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Also, check out a few of my other items
Icons used in the preview were from Pixden: http://www.pixeden.com/