Message board integration with existing site

I have a site with existing users and would like to add a message board such as phpbb or one of the others. The main requirement I have is I need to be able to use the existing user logins to access the forums. I also need a help desk ticket system that is also linked to the same users. I may however write that one myself as it doesn't need to be very sophisticated. Can some one recommend a php forum package and possibly a help desk ticket system that would be easy to integrate with my existing system? Basically what I will need to do is know how the account creation works with both systems and have my existing site populate the DB tables of each system and my existing login system set cookies or other variables so when they are logged into one they are logged into them all. -- Chris W KE5GIX Gift Giving Made Easy Get the gifts you want & give the gifts they want One stop wish list for any gift, from anywhere, for any occasion! http://thewishzone.com