Can I add actions to control automator to automator?
Automator itself does not ship with self referencing Automator actions.

GUI Scripting

Alternative approaches include using GUI Scripting to automate interactions with the Automator application. See Accessibility Preferences and GUI Scripting for an example of how to set this up on recent versions of Mac OS X.

automator Command Line Tool

OS X includes an automator command line tool. You can use this tool to incorporate your Automator workflows into other scripts. Through this tool you can pass in variables and thus manipulate the workflow's behaviour.

Beyond Automator

You may find GUI Scripting and the corresponding What Me Do action fragile or unpredictable. If so, consider tools such as Sikuli to help automate your Mac.