Multiple scripts, same username/password

Hello,

Wasn't sure where to put this so I'll put it here.


I was wondering what kind of luck people had using multiple scripts(forum,auction, CMS etc...) and having one USER table for all so that visitors need only one login. I'm not exactly sure what scripts I'll be using but there will be a forum, some custom built features and maybe a CMS and/or classified section and I want a universal login.

I have built web apps in the past so it is something I could work with and figure out, but I was just wondering how much success people have had trying to do something similar.

Thanks.