Here are the options you have aviailable for installing Zenoss Core 4.2:
Note: Zenoss Core 4 Beta is currently available. To install, download the auto-deploy script and execute it on a 64-bit Red Hat Enterprise Linux 6 or CentOS 6 system. It will download and install all necessary components. Then browse to localhost port 8080 to continue setup.
Installers, RPMs and VMWare virtual machine images of Zenoss Core 3.2.1 (our current release) are also available for download.