IIS Logs Cleanup in Powershell

Back in June I was working on cleaning up the IIS log files at work but I wanted to archive them instead of deleting them, just in case. I came across this script in Powershell.

http://gallery.technet.microsoft.com/scriptcenter/31db73b4-746c-4d33-a0aa-7a79006317e6

It works well but it needed the ability to archive a folder of folders instead of having to list each folder and the ability to backup previous months. So I updated it and I decided I would post it here in case it can help someone else.