check these posts http://rootzwiki.com/topic/36754-unlock-htc-droid-dna/
this is the page I used for unlocking http://www.androidpolice.com/2012/11/24/exclusive-how-to-unlock-the-droid-dnas-bootloader/
no worries, I made it happen twice and still got through it, I have two unlocked and rooted dna's sitting on my desk waiting to be able to make the system writable