The bulk of the work on the previous method posted by Rootzwiki developer jcase involved spoofing the HTCDev site into thinking your Droid DNA is one of the "all other supported models" that HTC allows you to unlock (Verizon had forced HTC to remove the DNA from the list of supported models). You would go through the process posted in his guide, then once you finish, you would go to HTCDev.com and void your warranty, erm, unlock your bootloader.
Now an app posted on XDA by a senior member named beaups does most of the work you had to do manually before. The instructions (taken from the XDA post) are as follows (this assumes you already have the Android SDK installed on your PC):
- download apk (attached cid.apk on the XDA thread)
- run it (in your app drawer titled HTC DNA SuperCID
- reboot to bootloader, plug the phone into your PC and confirm you have SuperCID by opening a command window from your android-sdk/platform-tools folder and typing "fastboot oem readcid"
If you see something else (e.g. VZW__001) then reboot normally and try the process again.
As always, neither myself, RootzWiki, XDA-Developers, nor beaups can be held responsible for you damaging your phone. You also void your warranty by unlocking your bootloader.