Add custom UI pages to maintenance tool

In order to replace the component selection page in the maintenance tool, I created a custom page for component selection. I then tried to add this custom page before the default component selection using

installer.addWizardPage(component, "ChooseUpdates", QInstaller.ComponentSelection);

but was only able to do this

installer.addWizardPage(component, "ChooseUpdates", QInstaller.LicenseCheck);