Create a straight forward Drupal 6 Forum/message board

I need a simple forum/message board for my personal family history site. I want to be able to do 2 things. 1) Post my own announcements 2) Let users post messages, questions, statements or whatever they want, on the same board. All posts (and replies to posts) should be viewable by anyone, without logging in. Appear in order of posting (newest at the top). People using my site arn't registered users, so I want the experience of posting to be as simple as possible for them. Ideally that means that they could post messages without signing up. However if they need a sign in to avoid spammers, then it needs to be quick and easy. I don't have high traffic, so the use of the board will likely be very minimal (perhaps nobody will use it!). I tried the Advanced Forum module,(it's still enabled) and failed... So if you can use that to achieve the outcome great. Happy to consider other options as long as the jobs done quickly, not too costly and won't create ongoing administrative issues. Thats it really, pretty simple, but I don't have the time or inclination to figure it out myself.