Create custom route handler for playframework

I want create a custom router for playframework but when extend GuiceApplicationLoader and set play.application.loader in configuration override default router.

How create custom router and not override default router.

class MyApplicationLoader extends GuiceApplicationLoader with GuiceableModuleConversions {
  override protected def overrides(context: Context): Seq[GuiceableModule] = {
    Seq(fromGuiceModule(new RouterModule)) ++ super.overrides(context)
  }
}