Are you talking about adding something similar to yahoo answers? Where a member asks a question, and other users answer to the best of their ability? I am a little confused on this. Please elaborate.
There really isn't a way to do this with how the forums work right now. The best solution to this that I could think of, would be something that I started back in the day. It was called: Ask a Moderator a question. Users could ask questions, and would get answered by a moderator to make sure it was answered correctly. I could set something like this up again.
If you have a question on something, just make a topic in the tavern, and sooner or later im sure a helpful member will swing by and answers your questions. That would be the way to go about doing this.