For those who arn't sure what they are doing (like me) check out this post from Phoenix first.
http://forum.ppcgeeks.com/showthread.php?t=5964
Hes done a great job putting together the files and most important for me, the instuctions line by line for us dummies. So simple to upgrade my xv6700 from 1.1 to 1.41 including how to put the phone in bootloader. THanks schettz for your wonderful explaination of when to upgrade. As always before u upgrade make damn sure your have your pc in the cradle or at least fully charged