how to downgrade:
IF you have a branded device, you have to make a Goldcard. Use "mmc2",
IF you dont have a branded device, Use "mmc1"
Digi machine is branded, so use "mmc2" and needed to make a GOLDCARD, check post 2.

dun actually understand this sentences, so do i need to make a gold card ?

currently im using build number ( 1.84.702.2)
from 1st page, its say that if i want to root my DHD i must downgrade to 1.32.405.6.
before that i need to make a goldcard

i have back up all data n apps + contacts
i downloaded the ADB and HxD Hex Editor
but when i check for the link that given
the link is not work one
luckily i still havent format my sd card...
so i ask u guys where can i do the

STEP 
You should get a very long number which looks like this: "532600bd227d9c0347329407514d5402"
Visit this page http://hexrev.soaa.me/, paste in your number and reverse it. In our example the result would be 00544d5107943247039c7d22bd002653.