class Mod
{
    $FullPath
    $ModId

    Mod($file) {

        $this.FullPath = $file.FullName;
        $this.ModId = $file.Directory.BaseName;
    }
}

$mods = New-Object System.Collections.ArrayList

Get-ChildItem -Path $args[1] -Filter *.pak -Recurse -File | ForEach-Object {
    $mods.Add([Mod]::new($_));
}

foreach ($mod in $mods)
{
    Write-Host Unpacking mod $mod.ModId 
    $path = Join-Path $args[2] $mod.ModId
    &$args[0] $mod.FullPath $path
    Write-Host
}