How can I use Typekit fonts with Drupal 6? Preferably without an extra module
If you want the typekit code on every page of your site and you don't want a complicated solution just put the code in the page.tpl.php file. They are external scripts I assume so drupal_add_js won't help you in D6.

You can add things to the scripts variable in template_preprocess_page(), but if you are going to do that on every page then you may as well just put it next to where the scripts are printed in page.tpl.php