It's very easy, IMO to make any diet dairy free (DASH, or not). From what I understand, the dairy in the omni diet is mostly for the calcium and there are loads of ways of getting calcium without doing diary. Deep leafy greens are one good way and certain beans are another. This link
lists the calcium amounts in different foods.
Here's more information regarding hypertention from PCRM (Physicans Comittee for Responsible Medicine) at this link
and the veggie starter kit is here
. The starter kit is about 12 pages long but has loads of good information about the veg*n diet (pages 10 and 11 go into vegan pregnancy and feeding kids which also make for excellent reading).
Since this site is written by physicians and not by scare-mongers or people trying to sell you things, I tend to take more stock in what they
say vs. other medical information sites that still function under old myths and ancient ideas. The site itself is www.pcrm.org
and the whole site is excellent reading.
I wish you much luck with your DASH diet, and congrats on your transition to veg.