Change logo link to your site, not RavenPHP
go to >themes>fisubice and edit the file header.html.
The code will be near the top.

Issue: changes to profile get "invalid session" error.
Change settings in forum admin for cookies.
Make sure domain is correct, and change cookie name: (e.g., from phpbb2mysql -> phpbb2mysql2

Changing RavenNuke's keywords
find /includes/meta.php
Edit keywords entry.

Also:
echo '<LINK REL="SHORTCUT ICON" HREF="http://www.yoursite.com/favicon.ico">';