tried the chmod thing...
I saw the other post asking about CHMOD'ing. I at least have an idea now what it is and how to use it. I typed chmod a=rx .htaccess in my temp/book directory (where I have my htaccess file). I assume you would only need read, and execute for this situation (if you even need both of them. Maybe I just need read or something).
I got no indication that the command worked, but there was also no error saying that it DIDN'T work.
I still get the same problem 500 error though. So I doubt if this is what caused the problem anyway