I'm new to this site but have been an xda member for some time now. I'm new to the HTC EVO world, I'm very familiar with Samsung phones, however I have to keep up with the EVO LTE as I've rooted and S-Off'ed my wife's phone. She's currently on 1.22.651.3 but want to update to the latest and greatest. As far as I'm understanding, I should flash the radio/firmware first from your other post.
The part that is confusing me is the OTA file. I don't really want to wipe the phone off, but update without touching Hboot. Since I have TWRP as the custom recovery and S-Off, am I able to just flash the OTA 1.22.651.3-2.13.651.1 (Rooted, firmware removed) you have provided? I'm not sure if that boot.img is needed to flash per your note. Again I truly apologize for the noobish questions. Any help would be extremely appreciated! Keep up the awesome work as well!