If this is for ServiceDesk 7.5 you may be able to achieve this by creating a rule in the OnIncidentReceived ruleset that looks for the specific classification and then sends to a custom workflow (via the send to external workflow action) which would perform the other actions you wanted.
An example of the send to external workflow action can be found here:
https://www-secure.symantec.com/connect/downloads/send-incident-workflow-automation-rule-example-notifying-users-comment-added