The default Powershell ISE application may be very helpful to you - it has a more robust notepad-esque environment in the upper half and a normal Powershell terminal below. It's free and included with the Powershell client.
If you want something way more robust that you can use for further and smoother interaction with WMI, .NET, and other Powershell-inclusive items, check out Powershell Explorer - 30-day demo, but very simple to use.
Biting the hand that feeds IT
