How do I send a workflow email notification to the author and reviewer?

I have a custom workflow email notification (using a template) that is sent to the reviewer when a document is checked in but I also want an email notification to be sent to the author either the same time a reviewer is notified or when the workflow is approved by the reviewer. How can I do this?

The current script in Entry is

<$wfSet("wfJumpEntryNotifyOff", "1")$>

<$wfNotify("TreasuryChequeApprover", "alias", "CIG_TSY_REVIEWER_MAIL")$>