You will need to have the Masque and Masque_FlatSquares addons to have the same texture skins. You might also need the SharedMedia addon for the font.
If you see double cooldowns on textures you may need to disable the cooldown text in the default Blizzard UI: Interface > ActionBars > Show Numbers for Cooldowns. You may also have similar issues if you're using OmniCC to show cooldowns and will have to disable them as well.