How Does One Re-run write_cd_rules

[Martin McCormick <martin@x.it.okstate.edu>]

	This system started out as lenny in 2009 and I just upgraded
to squeeze. Most of the system is fine but I have lost both
CDROM's which used to be /media/cdrom0 and /media/cdrom1. I
didn't help anything when I accidently left a usb drive
installed so it looks like the thing to do is clean out
/etc/udev/rules.d of 70-persistent-cd.rules and start over minus
the usb drive in the hopes that I can modify the rules to get
the CDROM's back.

	There is a executable file in /lib/udev called write_cd_rules
but I can't seem to find what calls it or what $DEVPATH value it
needs to run properly.

	Documentation as to how all this goes together is also
lacking. Google searches produce about ten-quadrillian hits of
which precisely one is relevant but described a similar
situation in fedora and the suggested fix didn't work, here, and
all the rest are just hits on copies of write_cd_rules and the
generator rules file that write_cd_rules uses when one runs it.

	Is there a way to re-run it and produce new files that
can be used as a starting point?

Thanks for all constructive suggestions.