These instructions will integrate FoxyCart with your Drupal 6 template. This is not a Drupal module, if you change templates then you will need to apply these steps again to the new template.
/sites/all/themes/mytemplate, make a directory foxycart-version. eg. foxycart-0.5.1YOURDOMAIN.FOXYCART.TLD with the path to your FoxyCart files, as indicated in your “sample code” page in your FoxyCart admin):.info file: stylesheets[all][] = foxycart-0.5.1/files/foxybox.css stylesheets[all][] = foxycart-0.5.1/themes/standard/theme.foxybox.css scripts[] = foxycart-0.5.1/files/foxycart_includes.js
Done. Now can add Foxy add to cart links, etc.. to your pages and blocks. Just make sure that you select an appropriate Input Filter otherwise all but the most basic HTML tags will be stripped and it won't work.