how do I go back to first page when wizard finish and hide i

[vh]

When my wizard finishes, I want it to go back to the first step so it can be launched correctly next time. But the problem is if I do this, it will show the first step for a moment before it disappears.

 <a4j:commandButton value="#{bundle.Finish}"
 action="#{desktopBean.saveDesktop}"
 id="finishBtn"
 oncomplete="Richfaces.hideModalPanel(windowId);"/>

Then I tried to use binding to bind the modalPanel to a bean, and do the follow, it didn't work, give a internal error.

public String saveDesktop() {
 ....
 wizardPanel.setZIndex(0); //I tried with different values.
 return "finish";
}

I am using 3.0.1.