SharePoint 2010 FAST Search: How do I create Managed Properties?

I have delving into the wonders of FAST Search and found this very helpful script to create managed properties.

It definitely saved my a lot of time and headaches. Thank you Ivan Josipovic.

Here is a copied version of the text:

function New-FASTManagedProperty([string]$Name, [string]$CrawledPropertyName, [string]$Type,[bool]$Refinement,$Sortable)
{
if ( (Get-PSSnapin -Name Microsoft.FASTSearch.PowerShell -ErrorAction SilentlyContinue) -eq $null )
{  
 Add-PsSnapin Microsoft.FASTSearch.PowerShell
}

    switch ($Type)
    {
        "Text" {$type = "1"}  #variant 31
        "Integer" {$type = "2"} #variant 3
        "Decimal" {$type = "5"} #variant 5
        "DateTime" {$type = "6"} #variant 64
        "Float" {$type = "4"} #variant 5 ?
        "Binary" {$type = "3"}  #variant 11
    }
    $managedproperty = Get-FASTSearchMetadataManagedProperty –Name $Name
   
    if ($managedproperty -eq $null){
        New-FASTSearchMetadataManagedProperty -Name $Name -Type $Type -ea 0
        $managedproperty = Get-FASTSearchMetadataManagedProperty –Name $Name
    }

    Set-FASTSearchMetadataManagedProperty –Name $Name –Queryable $true –StemmingEnabled $false –RefinementEnabled  $Refinement -SortableType $Sortable

    $cp = Get-FASTSearchMetadataCrawledProperty -Name $CrawledPropertyName
        if ($cp -eq $null){
            switch($type){
                "1" {$variant = "31"}  #Text 31
                "2" {$variant = "3"} #Integer 3
                "5" {$variant = "4"} #Decimal 5
                "6" {$variant = "64"} #DateTime 64
                "4" {$variant = "5"} #Float 5 ?
                "3" {$variant = "11"}  #Binary 11
            }
            New-FASTSearchMetadataCrawledProperty -Name $CrawledPropertyName -Propset "00130329-0000-0130-c000-000000131346" -VariantType $variant
            $cp = Get-FASTSearchMetadataCrawledProperty -Name $CrawledPropertyName
            write-host "Created $($CrawledPropertyName) Crawled Property"
        }

$property = Get-FASTSearchMetadataCrawledPropertyMapping -name $Name

if ($property -ne $null)
{
Remove-FASTSearchMetadataCrawledPropertyMapping –managedproperty $managedproperty -crawledproperty $cp -force
}

        New-FASTSearchMetadataCrawledPropertyMapping –Managedproperty $managedproperty –crawledproperty $cp -ea 0
           
       
    write-host "Created $($Name)"
}

It can be invoked as follows:

New-FASTManagedProperty "ListItemID" "ows_id" "Integer" $true "1"