Default file on a cck field
Probably you need to show a default PDF file attachment with custom type nodes. And need to upload some specific to replace the default one via CCK file field.

CCK file field cannot be associated with some default file easily.

The best approach can be...


Place the default document in file system
Edit content-type.tpl.php and check CCK field (e.g. $node-&gt;field_name) for file upload
Print the link of uploaded file if exists Else print the link to default file