imagefield provides a image field type to cck.

Installing Imagefield.module:
  Download the imagefield release for your version.
  Untar it in the Drupal modules directory.
  navigate to admin/modules and enable the module.


To make previews work you should update the .htaccess file in you files
directory.
  comment out RewriteEngine off
  add +FollowSymlinks to the Options stanza.




