Stop the existing TNS listener.
Move the entries for the default listener in the existing listener.ora file to the listener.ora file in the Oracle Database 10g home.
The string value located in the preceding registry tree is:
Name: FS_sid
_DB
Value: "sid,service_name,
database_name,parameter_file, disk_drive
"
Where:
sid
is the database instance (Example: OFS1)
service_name
is the database service name (Example: Sample.world)
database_name
is the name of the database (Example: OFS1DB)
parameter_file
is the name of the database parameter file (Example: S:\OFSDB\OFS1\PARAM\FS_INIT.ORA)
disk_drive
is the drive used by the sample database (Example S:)
INST
_DB.Oracle_Home
\fs\fssvr\sample or on the CD-ROM.