@Shn

Actually, PHP is used to generate HTML via echo and such... for example, you make a login script, if someone logs in with the right un/pass, you can echo a message that the user has logged in and do whatever else (such as assign stuff to a session, etc.), while if the user entered the wrong password or something, you can echo a nice 'fuck off' message... Also PHP can generate files with fopen, fwrite, etc. (like in C)

But I admin, PHP's whole point isn't to generate HTML, it's to generate HTML according to what a user does - there's a difference.

As for PHPBB, it's easy to install, just follow the instructions provided, then completely delete the install directory. Can you tell exactly where you're having a problem ?