Just browse what texture pack you like, then press Install, ALL DONE. Remember that you need BlockLauncher and official Minecraft Pocket Edition to apply.
This is an unofficial application for Minecraft Pocket Edition. This application is not affiliated in any way with Mojang AB. The Minecraft Name, the Minecraft Brand and the Minecraft Assets are all property of Mojang AB or their respectful owner. All rights reserved. In accordance with http://account.mojang.com/documents/brand_guidelines