Well, I just plain didn't have a .htaccess file at all. I found online what to put in one. Here's what I got:
AddHandler server-parsed .php
AddHandler server-parsed .php4
# -FrontPage-
IndexIgnore .htaccess */.?* *~ *# */HEADER* */README* */_vti*
<Limit GET POST>
order deny,allow
deny from all
allow from all
</Limit>
<Limit PUT DELETE>
order deny,allow
deny from all
</Limit>
AuthName http://www.example.com.au
AuthUserFile /var/chroot/home/content/f/r/e/frenzix1/html/_vti_pvt/servic e.pwd
AuthGroupFile /var/chroot/home/content/f/r/e/frenzix1/html/_vti_pvt/servic e.grp l>
I made that file, uploaded it, and now the site actually works! I just hope there is nothing in there that is going to mess up anything else. :-P