HP ProCurve 5412 sflow to Analyzer

I have 4 hp procurve 5412zl with fiber uplinks and 24 10/100/1000 ports in each module A through J. I want to monitor the total traffic on each of these switches and be able to drill down to the indvidual workstation on my network. I enabled sflow on my procurve for each module but now every port is showing up as an interface.

The two problems I need to work through are one how do I know which interface is the fiber link to see traffic and only monitor that. If I monitor ever port that is over 900 interfaces which is way over the number of licenses I have. The second is how do I identify the ports within netflow analyzer? I've already edited the SNMP settings but does it use the same port 161?

Any help would be appreciated.