Log-stash forwarder in a RHEL5 system

I downloaded and installed Elastic Search, Logstash and Kibana on a RHEL6 system. My components are running on a RHEL5 system. In order to save the CPU utilisation, i am planning to install the log-stash forwarder on RHEL5. But i am unable to find a help page to install on a RHEL5. Can someone help me?

You will probably need to compile this yourself, it's not an OS version we support unfortunately.

Thank You sir. Will you be kind enough to give me the supported and latest versions of ELK and forwarder for RHEL6?