You will need to place each of these codes into seperate pictures. To do so, go to "Upload / Change Photos," and click edit caption for the first picture, and paste one of the codes in, etc...

Adding a background
<body background="http://www.example.com/image.jpg">

Make your pictures table transparent
<style>table, td{background:transparent}</style>

Making your background stay in place
<style>body{background-attachment:fixed;}</style>