Copying an Organization and changing his Id

Hi everyone,

I started copying my organizations to create new environments. Everything is working great but my client came with an odd issue that they cannot configure the Production and the Pre-Production environment at the same time in Outlook. We figured out it was because they shared the same organization guid. Then, I found this article that gives a script to change it:

http://survivingcrm.com/2012/08/creating-a-copy-of-your-production-crm-database/

I'm using CRM 2013 and the orgs are on two differents servers.

So I have two questions. First, did some of you ever tried it in CRM 2013? Second, do you know any better way?

Thanks for your help,