I know you can run 2 wow windows on 1 computer. not sure how you can open HB up twice and inject it to each wow window individually.
but. once u figure that out.
You have to manually use 1 character to invite another.
then start the bot to Que you up.
same settings in bot #2 hit start.
you will get a spam of text saying leader must queue, just ignore that spam. the bot #2 will accept the dungeon Queue, once it pops up.
I learned that the hard/fast way Last night.
Complained about the no party mode in the support forums.
no good reply yet. so its manually invite for now.