I did that picture with photoshop, just used the magic wand to select the text from the original picture. Then, I just place the text vertical and saved it as a .jpeg file. Then uploaded the file to the website so they can make it.
I already did. And they are not separate items, the one on the left goes on the front (a top and bottom sticker with a background generated by the picture you upload) and the one on the right goes on the back of the phone. There are also side stickers that are not show that are an extension of the back (right) picture. I would show a picture of how it looks on my phone but it is pretty much identical to the one I already uploaded.