Need some help making a hack

[heretic]

ok, I want a user-defined custom header and footer. This is similar to the custom color hack released for 2.0.3 by Palmer ofShinra, however it's outdated in 2.2.1

I already have fields set up as fields 5 and 6, for the header and footer, respectively.

here's how I was modifying it, and I'm getting a parse error:

PHP Code:

      //  attempt at auto-surround post with tags
      if ($bbuserinfo[5] != " ") && ($bbuserinfo[6] != " ")  {
        $message = "$bbuserinfo[5].$message.$bbuserinfo[6]";
        } 


Also, I might not be putting them in the right place. anyone able to help?