How to create a custom home page on your Drupal / Zen site
If you have a drupal site using the Zen them, and you want a radically different home page than the rest of your theming, and you know how to code even simple HTML/CSS, then you're in luck.
Take your page.tpl.php from sites/all/themes/zen/zen to your subtheme folder, naming it page-front.tpl.php. Code out the page you want, flush your themes registry in Drupal and VOILA.
*Note - it will look for images, stylesheets and other files you reference in the root of your Drupal site. NOT the root of your subtheme.
well if you simply need a different template for ALL internal pages and one for the front page you can just use page.tpl.php (thats for internal/default pages) and page-front.tpl.php (for the front page).
Otherwise there isnt a "quick and easy" way to do that, however there are multiple ways.