PHP/CGI ~ Password/datafile related question.

I've recently started building a website which offers many features to members, such as a forum, chatroom, comments to news posts, free e-mail, free website hosting, "MEMBERS ONLINE" feature, and so on. My problem is this: where as I am learning client-side programming fairly easily, I still have much to learn in the server-side aspect. Therefore, I have thus far used several different pre-written scripts to accomplish what I need done, and this is resulting in a very frustrating experience for the user. This is because they must register themselves as a user and create a name and password for each feature. Is there anyway I can unite them all so that a user can fill out one form and have it write the apropriate name and password in each of the user datafiles for each feature? As far as form processing, I can only find scripts that will write to one file. I'd like one form to submit the proper data to all the files at once. I have located all the files that it must write to, but I cannot find the means to do it, nor do I know if it will even work correctly if I do. Are my countless hours of searching CGI and PHP script archives futile, or can it be done? If it can, I'd appreciate anyone helping to get me in the right direction. I thank you for your time in advance.

You might benefit from a portal like phpnuke http://www.phpnuke.org along with the addon from http://www.nukeaddon.com . They can be quite difficult to set up but will give you many of the features you require with one login. You will need php and mysql and a liitle patience.