listener password in oracle 7x

[KenCunningham]

From a LSNRCTL for NX Version 7: Version 2.1.4.1.0 session (Oracle 7.3.4):

LSNRCTL> help
The following operations are available
An asterisk (*) denotes a modifier or extended command:

start stop status services version reload
trace spawn quit exit cancel* repeat*
set* show*

As you say, there is no save_config - perhaps it's saved by default in that release?