This script is largely written by Alan Renouf - I put this here for my own reference because I made some modifications. Please visit his site at: http://www.virtu-al.net/2011/09/30/automated-install-of-vshield-services/

vShield.ps1

Add-PSSnapin VMware*

Function Connect-vShieldServer {
	<#
		.SYNOPSIS
			Connects to a vShield Manager Server.

		.DESCRIPTION
			Connects to a vShield Manager Server. The cmdlet starts a new session with a vShield Manager Server using the specified parameters.

		.PARAMETER  Server
			Specify the IP address or the DNS name of the vSphere server to which you want to connect.

		.PARAMETER  Username
			Specify the user name you want to use for authenticating with the server.

		.PARAMETER  Password
			Specifies the password you want to use for authenticating with the server.

		.EXAMPLE
			PS C:\> Connect-vShieldServer -server "192.168.0.88" -username "admin" -password "default"
	
Credit to Alan Renouf 
http://www.virtu-al.net/2011/09/30/automated-install-of-vshield-services/

#>
	[CmdletBinding()]
	Param (
		[Parameter(ValueFromPipeline=$true)]
		$Server,
		$Username,
		$Password
	)
	process {

		$httpClient = [System.Net.WebRequest]::Create("https://$server/api/2.0/app/firewall/protocols")

		# Add Authorization headers
		$authbytes = [System.Text.Encoding]::ASCII.GetBytes($username + ":" + $password)
		$base64 = [System.Convert]::ToBase64String($authbytes)
		$authorization = "Authorization: Basic " + $base64
		$httpClient.Headers.Add($authorization)

		# Set Method
		$httpClient.Method = "GET"
		$response = $httpClient.GetResponse()
		If ($response.StatusCode -eq "OK") {
			$Global:DefaultvShieldServer = New-Object -TypeName PSObject -Property @{
				Name = $Server
				ServerUri = "https://$server/"
				Authorization = $authorization
			}
		Write-Host -ForegroundColor Yellow "Connected Succesfully to $Server"
		} Else {
			Write-Host -ForegroundColor Red "Unable to connect to $Server, debug info:"
			$response
		}
	}
}
Function Get-NetworkID ($Datacenter) {
	$datacenterView = ($Datacenter | Get-View)
	$datacenterView.Network | Foreach {
		$Network = New-Object -TypeName PSObject -Property @{
			Name = (Get-View –Id $_).name
			ID = $_.Value
		}
		$Network
	}
}
Function Post-vShieldAPI ($URL, $Body) {
	$wc = New-Object System.Net.WebClient

	# Add Authorization headers
	$URL = ($Global:DefaultvShieldServer.ServerUri) + $URL
	$wc.Headers.Add(($Global:DefaultvShieldServer.Authorization))
	$wc.UploadString($URL, "POST", $Body)
}
Function Install-vShieldApp ($VMHost, $Datastore, $ManagementPortGroup, $ManagementIP, $ManagementNetMask, $ManagementDGW) {
	$VMHostMR = ($VMHost.Id).trim("HostSystem-")
	$DatastoreMR = ($Datastore.Id).trim("Datastore-")
	$NetworkMR = (Get-NetworkID -Datacenter (Get-Datacenter) | Where { $_.Name -eq $ManagementPortGroup}).ID

$Body = @"
<VshieldConfiguration>
	<VszInstallParams>
		<DatastoreId>$DatastoreMR</DatastoreId>
		<ManagementPortSwitchId>$NetworkMR</ManagementPortSwitchId>
		<MgmtInterface>
			<IpAddress>$ManagementIP</IpAddress>
			<NetworkMask>$ManagementNetMask</NetworkMask>
			<DefaultGw>$ManagementDGW</DefaultGw>
		</MgmtInterface>
	</VszInstallParams>
	<EpsecInstallParams>true</EpsecInstallParams>
	<InstallAction>install</InstallAction>
</VshieldConfiguration>
"@
	Post-vShieldAPI -URL "api/1.0/vshield/$VMHostMR" -Body $Body
}

Connect-vShieldServer -Server 192.168.0.10 -username admin -password default
Connect-VIServer -Server 192.168.0.11 -user "admin" -password "password"

$i = 130
Get-VMHost -Location CLUSTER01 | foreach {
#26-36
    $Datastore = Get-Datastore "DS01"
    $PortGroup = Get-VirtualPortgroup -VMHost $_ -Name "VMWare Management"

    $iStr = $i.ToString()

    Install-vShieldApp -VMHost $_ `
	    -Datastore $Datastore `
	    -ManagementPortGroup $PortGroup `
	    -ManagementIP "192.168.0.$iStr" `
	    -ManagementDGW "192.168.0.1" `
	    -ManagementNetMask "255.255.255.0"

    $i++

    Write-Host "Installed on $iStr"
}