Do not mark your threads as urgent. It makes no difference as to how quickly you get help. We only see your thread at the few times we log on per day.
Well at least it wont make it quicker. I for one tend to read those ones last because they're from people who are too lazy to give all the information up front.
The best thing you can do to get help as fast as possible is to provide everything that migth be useful to help you. It's all in the details. Make sure you're read "How to ask questions the smart way".