In today's podcast, Bob dives into the world of Drupal theming by showing how to create a node-custom.tpl.php file and how to use print_r($node). The alternative to this is to do all the same stuff but use contemplate.module. Hopefully it makes sense...Bob recorded this one pre-coffee.

if($teaser)....orif($page)...I'd love it if someone corrected me and said you could do this with teasers...that would be great! Also, note that you must have a node.tpl.php file in order for a node-custom.tpl.php to work. I think they changed this in a later version of D6, but haven't confirmed that. If you don't have a node.tpl.php, make sure to add one before adding a custom version.