This should give you some details about configuring Windows Event data consumption ( see section "Collect event logs from a remote Windows machine" onwards)
http://docs.splunk.com/Documentation/Splunk/6.1.2/Data/Monitorwindowsdata
This should help for IIS data.
http://answers.splunk.com/answers/110846/help-configuring-universal-forwarder-with-iis-logs
General information on how to use forwarders available here.
http://docs.splunk.com/Documentation/Splunk/6.1.2/Data/Usingforwardingagents
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