Originally Posted by racefan20

You don't have to do anything regarding databases or installation. Just go to Fantastico, click on phpBB, new installation, name (but don't create) the directory (forum, forums, message board, etc) and let Fantastico do the work for you. Questions 1 through 8 will be answered for you by Fantastico.

If you want to have three separate forums, simply install in three different directories. All you have to do is give them different names. But yes, you'll have to do the install three separate times in Fantastico and upload the styles three different times. Creating three forums should take you around ten minutes, uploading of styles included.