Install IIS and other IIS stuff on Server or a Desktop

I searched around, and didn't find anyone who had a way to install IIS from POSH. And if they got close, they didn't say that it didnt work on a server, or a desktop depending on the script. So here is one that will work on both, depending on what the user says they have:

#########################################################
#
# Script to install IIS.
#
# Created Sept 20, 2010
# Bryan Loveless 
#
#
# Requires Powershell 2.0
#
# Change your Execution policy to RemoteSigned if running locally
# by: Set-executionpolicy -executionpolicy RemoteSigned
#
#Prereqs: 
#
########################################################


$whorunsthis = Read-host "Is this a (S)erver or your (L)ocal_Developer box? (S/L)"

if ($whorunsthis -eq "S" )
    {   
 #get-windowsfeature will get list of Windows Component Intalled on SERVER

 Import-Module servermanager

 add-windowsfeature Application-Server
 add-windowsfeature AS-NET-Framework
 add-windowsfeature AS-Web-Support 
 add-windowsfeature AS-WAS-Support
 add-windowsfeature AS-HTTP-Activation  
 add-windowsfeature File-Services
 add-windowsfeature FS-FileServer
 add-windowsfeature Web-Server
 add-windowsfeature Web-WebServer
 add-windowsfeature Web-Common-Http
 add-windowsfeature Web-Static-Content
 add-windowsfeature Web-Default-Doc
 add-windowsfeature Web-Dir-Browsing
 add-windowsfeature Web-Http-Errors
 add-windowsfeature Web-Http-Redirect
 add-windowsfeature Web-App-Dev
 add-windowsfeature Web-Asp-Net
 add-windowsfeature Web-Net-Ext
 add-windowsfeature Web-ISAPI-Ext
 add-windowsfeature Web-ISAPI-Filter
 add-windowsfeature Web-Health
 add-windowsfeature Web-Http-Logging
 add-windowsfeature Web-Log-Libraries
 add-windowsfeature Web-Request-Monitor
 add-windowsfeature Web-Http-Tracing
 add-windowsfeature Web-Security
 add-windowsfeature Web-Basic-Auth
 add-windowsfeature Web-Windows-Auth
 add-windowsfeature Web-Digest-Auth
 add-windowsfeature Web-Client-Auth
 add-windowsfeature Web-Cert-Auth
 add-windowsfeature Web-Url-Auth
 add-windowsfeature Web-Filtering
 add-windowsfeature Web-IP-Security
 add-windowsfeature Web-Performance
 add-windowsfeature Web-Stat-Compression
 add-windowsfeature Web-Dyn-Compression
 add-windowsfeature Web-Mgmt-Tools
 add-windowsfeature Web-Mgmt-Console
 add-windowsfeature Web-Scripting-Tools
 add-windowsfeature Web-Mgmt-Service
 add-windowsfeature NET-Framework
 add-windowsfeature NET-Framework-Core
 add-windowsfeature NET-Win-CFAC
 add-windowsfeature NET-HTTP-Activation
 add-windowsfeature Multipath-IO
 add-windowsfeature RSAT
 add-windowsfeature RSAT-Role-Tools
 add-windowsfeature RSAT-Web-Server       
 add-windowsfeature SNMP-Services
 add-windowsfeature SNMP-Service
 add-windowsfeature SNMP-WMI-Provider
 add-windowsfeature Windows-Internal-DB
 add-windowsfeature PowerShell-ISE
 add-windowsfeature WAS
 add-windowsfeature WAS-Process-Model
 add-windowsfeature WAS-NET-Environment
 add-windowsfeature WAS-Config-APIs
 add-windowsfeature WSRM

}

elseif ($whorunsthis -eq "L")
    { 

 #oclist will give a list of what is possible
 # or try http://technet.microsoft.com/en-us/library/cc722041%28WS.10%29.aspx

 #below is for Desktops (windows 7)

 # install IIS Role
 ocsetup IIS-WebServerRole
 ocsetup IIS-WebServer
 ocsetup IIS-CommonHttpFeatures
 ocsetup IIS-DefaultDocument
 ocsetup IIS-HttpErrors
 ocsetup IIS-HttpRedirect
 ocsetup IIS-StaticContent
 ocsetup IIS-HealthAndDiagnostics
 ocsetup IIS-CustomLogging
 ocsetup IIS-HttpLogging
 ocsetup IIS-LoggingLibraries
   #ocsetup MSMQ-HTTP possbily needed for Ektron
 ocsetup IIS-RequestMonitor
 ocsetup IIS-Performance
 ocsetup IIS-HttpCompressionDynamic
 ocsetup IIS-HttpCompressionStatic
 ocsetup IIS-Security
 ocsetup IIS-BasicAuthentication
 ocsetup IIS-ClientCertificateMappingAuthentication
 ocsetup IIS-IISCertificateMappingAuthentication
 ocsetup IIS-IPSecurity
 ocsetup IIS-RequestFiltering
 ocsetup IIS-WindowsAuthentication
 ocsetup IIS-WebServerManagementTools
 ocsetup IIS-IIS6ManagementCompatibility
 ocsetup IIS-ManagementConsole

 # install .net
 ocsetup NetFx2-ServerCore
 ocsetup NetFx2-ServerCore-WOW64
 ocsetup NetFx3
 
 #install ASP
 ocsetup IIS-ASP
 
 # install asp.net  start /w
 ocsetup WAS-NetFxEnvironment
 ocsetup IIS-ISAPIExtensions
 ocsetup IIS-ISAPIFilter
 ocsetup IIS-NetFxExtensibility
 ocsetup IIS-ASPNET
 ocsetup IIS-ApplicationDevelopment
 ocsetup WCF-HTTP-Activation

}

else
    {write-host "you must select S or L"  
    Exit}