Queueing train orders, getting queue length?

Well, I'm trying to make a nice trigger which will train units automaticly when there are no other units/researches queued. Anothing issue is calling IssueImmediateOrderById(u, i) which seems to skip the queue. Any ideas on how to get this working properly? I want it so that eg someone trains a footman and queues a rifleman, the footman won't be mass produced...

nvm this thread, triggered it a couple of days ago :o

edit: sorry for doubleposting, didn't realize the edit button was *always* clickable