Help - Site Design Layout

I am creating a site in Adobe Photoshop 8.0. I plan on splicing and exporting images and html when I am done with the layout.

It has raised a few questions:

See sample: http://www.steadyscene.com/mock2.jpg

  1. how do I make the large photo of the man change everytime the site is loaded? randomly.

  2. how do I make the “editable html text area” (which will be spliced out) its own seperate frame with scrollbars?

Regards,
Daniel