Auditing in old versions of Linux

Due to technical and budget constrains, we are not yet able to migrate some old linux boxes to the latest versions but need to configure auditing under the following platforms : - Red Hat Linux Enterprise AS 3.4, 3.5, 3.6 - Red Hat Linux 4.x Need advice to confirm if auditing is possible under this versions and also the recommended procedure to install/setup as I understand that the auditd package depends on the kernel version. Regards Mario