Hi all i've just followed the easiest guide ever to rooting my DHD it took less than 10 mins 
if you don't want to wait till visionary is updated follow this guide.
http://forum.xda-developers.com/showthread.php?t=834427
if you don't want to wait till visionary is updated follow this guide.http://forum.xda-developers.com/showthread.php?t=834427