Message board.

I own a domain were building a site but were haven major problems on the message board. The reason is we have a special use for it. Its a little more than most people do with there board. Were trying to setup phpbb. We can use any thing though. Basicly we need a way to sort catogorys and sub catorgoys by alphabet. We also need to add another subcatogory I guess you would call it. We will have more projects too when this is done for you to work on. So basicly I need to have a mod made for phpbb to sort by alphabet theres probley one made I just cant find it. Also need a way to make it where theres 3 levels of catogorys so you Click on say california, under that will be another catogory say its the county, so Sandigeo under that is few different sub catogorys like say 10 citys. then you click the city and posts would be there. Sorry if this is confusing dont know excatly how to word this.