Add-Type -AssemblyName System.IO.Compression.FileSystem
$zip = [System.IO.Compression.ZipFile]::OpenRead('A:\firmware.zip')
foreach ($entry in $zip.Entries) {
    if ($entry.FullName -match 'boot|init|scatter') {
        Write-Host "$($entry.FullName) - $($entry.Length) bytes"
    }
}
$zip.Dispose()