problem that im getting in my phpbb webby...

hi, im new here...
i was just wanting to know if any of you guys would be able to help me with a website problem i am getting...

so here it is, i have a phpbb website and i was wondering; does anyone know how to add text and remove the phpbb text from the banner?
im pretty confident that i will get a good respone grom this website because i can see that it is also a phpbb webby!

that would be great if somebody knows how to.!
cheers!