public class CustomWizardPage : WizardPage
{
	private ContentControl footerContentControl;

	public override void OnApplyTemplate()
	{
		base.OnApplyTemplate();
		this.footerContentControl = this.GetTemplateChild("PART_FooterContentControl") as ContentControl;            
		this.DataContextChanged += CustomWizardPage_DataContextChanged;            
	}

	private void CustomWizardPage_DataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
	{
		this.footerContentControl.Content = e.NewValue;
	}
}

<telerik:RadWizard.WizardPages>
	<local:CustomWizardPage />
</telerik:RadWizard.WizardPages>