http://androidforums.com/desire-hd-...-downgrade-2-37-1-32-405-6-100-confirmed.html
Well, I used the one in step 2 not the 5
Is this right?
Nope, you need the one from step 5.
As you were coming from 2.36.405.8, this is the guide you should have been using. In all fairness though, the steps are pretty much the same (save for the Chinese ROM bit).

