Include phpBB header in wordpress?

Is there a way I could included my phpBB header into wordpress? I have wp-united installed, you can see it here: https://www.harleyforever.com/community/index.php

I’d like to have my phpBB header show up on my main blog page at https://www.harleyforever.com/community/blog.php

I’m using phpBB v.2.0.23. I know it’s outdated, but it’s the version I need for another script it works with.

Any help would be appreciated. Thanks.