How to Compress FastDL Files to .bz2 in CS 1.6

$src = "C:\fastdl\cstrike"
$dst = "C:\fastdl\cstrike_bz2"
$sevenzip = "C:\Program Files\7-Zip\7z.exe"

Get-ChildItem $src -Recurse -File | Where-Object { $_.Extension -ne ".bz2" } | ForEach-Object {
    $rel = $_.FullName.Substring($src.Length).TrimStart('\')
    $out = Join-Path $dst ($rel + ".bz2")
    New-Item -ItemType Directory -Force -Path (Split-Path $out) | Out-Null
    & $sevenzip a -tbzip2 -mx=9 $out $_.FullName | Out-Null
    Write-Host "Done: $rel"
}
Write-Host "Finished."

powershell -ExecutionPolicy Bypass -File C:\fastdl\bz2.ps1