Hello to all the newcomers! I'm glad that so many have joined this wonderful game this week
About your questions, Hector, I believe you'll only have to download the newest patch from here:
http://www.shrapnelgames.com/Illwint...DOM3_page.html
About how to counter the Helhirdlings Im afraid I don't know. Im still learning since im quite new to this game myself
Altough, probably some nice aoe spells would do the trick