How do I set my alerts to more than one suburb?

Alerts are set up to be for each suburb but you can sign up for as many of these as you like. This will mean you will get multiple emails, one for each alert. I find this is useful though as I can see the new results for individual suburbs rather than all in one email. Does this help?

I believe if you just hit the 'Create an alert' tab, you can do it more than one and make it for different suburbs.
Hope this helps.