setuid, locked data, security

Hi, I have an account at a sun server. Until now I've used perl to write CGI scripts. Is there a possibility to prevent files and directories from being read by other users (NFS). Since I'm not root I do not have the possibility to use POSIX functions to set the UID of the current process to my own. This would make it possible to set files as -rw------- so that no one can read it, just the script itself (which is set to -rwsr-xr-x). Setting the setuid flag of a PHP script doesn't make sense, I guess. Is there any alternative?? Any help would be appreciated! Best Regards, :-)hris -- Christian Kaiser