I want to create a template for a postcard that a printer
will print double sided.

The first 'side' will just have a picture inserted.

The second side needs to be split so the left hand side
can contain the text message and the right hand side the
address and a space for postage.

I've tried but cant seem to create a template with two
different page layouts in the same document.

Any suggestions, or better yet send me an example. I'm not
proud!  Thanks.