PowerShell: Script to Create a Website

//enable run script in PowerShell
Set-ExecutionPolicy RemoteSigned

//import module
Import-Module WebAdministration

//create a application pool
New-WebAppPool testpool
Set-ItemProperty iis:\AppPools\testpool -name processModel -value @{username="administrator";password="password";identitytype=3}
Set-ItemProperty iis:\AppPools\testpool -name managedRuntimeVersion -value v4.0

//create a web site
New-Item iis:\sites\testSite -physicalpath "C:\Users\WebSite" -bindings @{protocol="http";bindingInformation=":8083:"} -ApplicationPool testPool
$website = get-item iis:\sites\testSite
$website.virtualDirectoryDefaults.userName="administrator"
$website.virtualDirectoryDefaults.password="password"
$website | set-item