Read a file add to load testing file

I used this script to read a few months worth of my IIS logs to create a single log file.  I used the single file for load testing with Web Application Stress tool. 

$a = gci -Path C:\inetpub\iislogs3.com\wwwlogs\test -Filter *.log

foreach($file in $a)
{
             Write-Host "Processing - $file"
             $a = gc $file.FullName
             Add-Content -Path c:\temp\loadtest.log -Value $a

}

Cheers,

Steve