There is no such thing as agentless monitoring! You either use the one provided by the vendor of the monitoring software or you are using the one built into the OS. That is a marketing scam and don't get sucked into it.
Dennis ~ Upgrade to Next Generation Antispam/Antivirus with Ninja! ~ ~ <http://www.sunbelt-software.com/SunbeltMessagingNinja.cfm> ~