The best way IMO to get attention to an unanswered question is to 'bump' it. DOing this after a few hours is pointless but after a few days it can dissapear behind all the new posts and simply replying to own thread brings it back to the top.
By posting new threads you simply increase this effect for others. If everyone would post new threads for unanswered questions, the forums would flood and bury itself under a pile of new posts.
To answer your question, I have no idea, sorry.
