This is a small CLI/Shell programme that will go through your message.data
file and change all names addressed to and from a specified user to a new
specified name.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  253     614  41.2% -lh5- 3e2f Dec 28  1992 file_id.diz
[generic]                 1338    2268  59.0% -lh5- 3d2c Dec 28  1992 NewName
[generic]                 2998    6749  44.4% -lh5- 77c7 Jul 12  1997 NewName.doc
[generic]                  845    1926  43.9% -lh5- 5061 Aug  9  1996 TwistedDreamsBBS.Displayme
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         4 files    5434   11557  47.0%            Jul 12  1997