Acquire a copy of the OpenVMS V2.0 Freeware CD-ROM, and look for the
DFU utility -- DFU can do this for you.
The OpenVMS Frequently Asked Questions (FAQ) posting contains pointers
to various Internet sites, including sites where the Freeware CD-ROM
is accessable via ftp. The FAQ is archived at:
CompuServe VAXFORUM, Library 0, VMSFAQ.TXT