$dir = 'C:\Temp\S3Tests'
Set-Location $dir
[System.Reflection.Assembly]::LoadFile("$($dir)\dlls\AWSSDK.Core.dll")|Out-Null
[System.Reflection.Assembly]::LoadFile("$($dir)\dlls\AWSSDK.S3.dll")|Out-Null

$reg = [Amazon.RegionEndpoint]::EUWest2

$awsAccessKeyId = 'xxxxxxxxxxxxxxxxxxxxxxxxxx'
$awsSecretAccessKey = 'xxxxxxxxxxxxxxxxxxxxxxxxxx'
$awsBucketName = 'my-bucket-name'
$keyName = "33a8b78e-cf3b-4782-9885-d34110cd8c09"

$client = New-Object Amazon.S3.AmazonS3Client($awsAccessKeyId, $awsSecretAccessKey, $reg)

$objs = $client.ListObjects($awsBucketName)

foreach($obj in $objs.S3Objects) {

    Write-Host "Object key: $($obj.Key)"

    $obj = $client.GetObject($awsBucketName, $keyName)
    $hdrs = $obj.Headers
    $meta = $obj.Metadata
    $tagc = $obj.TagCount

    Write-Host "Headers"
    $hdrs.Keys|%{"  $($_): $($hdrs[$_])"}

    Write-Host "`nMetadata"
    $meta.Keys|%{"  $($_): $($meta[$_])"}

    Write-Host "=========================="

}

$client.Dispose()