Persona 4: Golden - Applying the PS Vita Skin Trailer
Check out a how-to video for Persona 4: Golden in preparation for the Dezaegg skin.
here's the best way to apply it: first peel off the left side only and cut this part of the lower layer off. this way you can apply the left side of sticker and center it on the buttons without risking creases and misalignments on the other side. then, you can gradually peel off the rest of the sticker to apply it.