This is assuming you can get apache to recognize the mime type and you
can get apache to work in general on your box.
Yup, it does sound simple. Unfortunately, those instructions are for
Windows:
"Item 3: Make the .torrent files
Download and install CompleteDir from the download page. It will
install under Start > All Programs > CompleteDir."
CompleteDir is a Windows program.
BTW, that same site has links for a Windows BT client and a slightly
out-date OS X client. On the linux side, you can use 'apt-get install
bittorrent' on Debian boxes. Not so sure how on Red Hat or other
RPM-based distros.