The data you are thinking of, if you can get it via the EMC perf tools, you likely can get it via SNMP as well. Attempt that snmpwalk command but this time go against the EMC managment IP and use oid: 1.3.6.1.4.1.1139.1.1.1.20
If it works, you should readily be able to graph the results. It will not be linked to the Windows server, but the EMC device. You will at least have the data inside Zenoss itself however.