[development] Automatic path to filefield on node_import

Hi there: I have a problem between node_import and filefied when I set the "Path Settings" of the cck filefield like [user]-[site-date-dd][site-date-mm][site-date-yyyy]. When I perform an import of node where there are also importing files, I get an error node_import failing to recognize the FileField Tokens. Is there any way to make me recognize node_import these tokens? Can I do this programmatically? Where should I have to modify the code to achieve this? Thanks a lot, sincerely, Gustavo.-