I would like to know if there is a step by step process to install on redhat es3.0
There currently is not; although the RH9 package should work for you (although its not been tested).
After this is installed, usual Red Hat commands should work;
[bcfd83b7dda]service netmrg start[/bcfd83b7dda] - this will enable the netmrg-gatherer cronjob
[bcfd83b7dda]chkconfig netmrg on[/bcfd83b7dda] - this will enable the netmrg-gatherer cronjob at boot
The other installation instructions should apply; you need to import the netmrg.mysql file, and setup permissions.