Martin,
In SCC 3.3 we have an entire section dedicated to calling scripts both on Windows and Unix.
http://infocenter.sybase.com/help/topic/com.sybase.infocenter.dc01267.0330/doc/pdf/scc_iq.pdf
Starting around page 309 it refers to scripts and how to call them.
In theory, you could have a script called for any severity of any alert and then programmatically decide what to do with the alert.
With IQ 16 SP08, with SCC and IQ Cockpit are delivered and supported. The rationale being that more legacy centered customers are familiar with SCC (and the legacy Sybase Central) while the SAP centric customers are familiar with the notion of Cockpits.
IQ Cockpit supports script execution, too. Check out the doc here: http://help.sap.com/Download/Multimedia/zip-iq1608/iqcockpit.pdf
Around page 1182 it refers to "Script Execution". Go into the Alerts area, then Notify. Change the email or script options as necessary.
With either tool, you should be able to write scripts that fire based on alerts so that you can then pass those to any tool you wish.
Mark