You can create a file in directory /etc/modutils file contain your modules and run update-modules to recreate /etc/modules.conf
W > I had an old working RedHat version with also installed. I went to move > my changes to /etc/modules.conf over to the new Debian version. I opened > up the /etc/modules.conf and it said, "don't edit me", and directed me > into other files, upon which I got lost trying to figure it out.