I suppose just run the two line commands with your new user name and password. You can change the port too.
Command 1)
./owsadm.exe -o setadminport -s /etc/httpd/conf/httpd.conf \
Command 2)
-port 8090 -username YourName -pw YourPass
Then:
/sbin/e-smith/expand-template /etc/httpd/conf/httpd.conf
and:
service httpd restart