I'm at the "Install an AppExchange dashboard ..." challenge but I'm worried about trying to do it.  We had a bad experience a few weeks ago when an application admin tried something similar and it went into our Production environment instead of her personal Development environment.  Can I be sure that running this challenge will not affect our Production or Sandbox environments in any way?  

I'm at the "Install an AppExchange dashboard ..." challenge but I'm worried about trying to do it.  We had a bad experience a few weeks ago when an application admin tried something similar and it went into our Production environment instead of her personal Development environment.  Can I be sure that running this challenge will not affect our Production or Sandbox environments in any way?