AT&T HTC ONE M8 Need Help Updating Firmware to 5.0.x

I would like to know if someone could help me out i am trying to install ViperOneM8 but on there website it says that i need to update my firmware to 5.0.x Lollipop and i seem to not be doing something right or getting the right files cause everything i have tried fails to update these are the threads i have looked at so far if i have missed something please let me know.

http://forum.xda-developers.com/htc-...uu-m8-t2813792

http://forum.xda-developers.com/att-...ypted-t3031703

http://forum.xda-developers.com/htc-...angle-t3015597


Software Information for my phone