A script for running multiple processes in parallel.

fan.ps1

param(
    [String[]] $Files, 
    [String] $Run
)

$processes = @()
foreach ($f in $Files) {
	$processes += Start-Process -FilePath $Run -ArgumentList $f -PassThru
}

foreach ($p in $processes) {
	$p.WaitForExit();
	$p.ExitCode;
}