adding graphic header in forum

i have just installed Phorum 3.4.6 and i would like to modify the head of the forum to insert a firework html file icluding a customized graphic headinng. i would like insert that file with dreamweaver. How can i do that.

any tips please...

i would also like to get rid of the text title that has been inserted in the forum when i created it.

Edit the header.php in the include folder