Bananasft

$inPath = "C:\NMS\unpacked";
$outPath = "C:\NMS\unpacked_exml";
$mbinCompiler = "C:\NMS\tools\MBINCompiler.exe";

Get-ChildItem $inPath -Filter *.mbin -Recurse | % { 
    $outDir = $_.Directory.FullName.Replace($inPath, $outPath);
    if(!(Test-Path $outDir))
    {
        New-Item $outDir -ItemType Directory  | Out-Null
    }

Bananasft

function Get-MBinType
{
    PARAM(
        [Parameter(Position = 0, Mandatory = $true, ValueFromPipeline = $true)]
        [System.IO.FileInfo]$File
    )
    PROCESS
    {
        $start = 0x18
        $end = 0x58