This works. Excellent.
I followed the AT&T rooting procedure which always put in me into the Andrioid Recovery Mode, then I came across this post and followed the steps ans it works.
Just make sure when using the ES file exploerer to rename the script, make sure your go to setting first, then scroll down and check all the boxes in the root setting section, or else you don't have access to system files.
I also download he Root Checker and Rom Manager from Play store. Root Check can verify if you have root access and Rom Manger can hrlp you boot into CMW recoverary esaily.