Nope, doesn't matter =)
As you go through that thread, it'll tell you to delete the "vendor.xml" file from your computer.
That files tells Desktop Manager not to install any OS to your phone that is not branded to your carrier... Once you delete that, all OS's become the same, and it wont harm your phone at all
I'm using that OS right now on my tmobile phone as well, and I haven't had any problems =)
When you delete that vendor file though, make sure that you delete it from the recycle bin as well, the first time I updated it still read that file it seemed, and I had to start all over because it said that the OS wasn't for my phone lol