After trying to follow the advice on
http://www.reactivated.net/writing_udev_rules.html, I am still finding
it impossible to get group access to  dvd on /dev/hdc and cdrom on /dev/hdd.

My system is a LinuxFromScratch (LFS) version 6.1.1 using udev-056 attached.

I have added this two line file to /etc/udev/rules

BUS=="ide", KERNEL=="hdc", SYMLINK+="dvd", GROUP="cdrom"
BUS=="ide", KERNEL=="hdd", SYMLINK+="cdrom", GROUP="cdrom"

This file is saved as 10-local.rules and  on failure as 60-local.rules.
Restarting udev using LFS bootscripts (where $e is an exported link to
the /etc/rc.d/init.d folder) I get
root@lfs-6:/etc/udev/rules.d# ls -l
total 24
-rw-r--r--  1 root root  120 2006-08-31 12:05 10-local.rules
-rw-r--r--  1 root root  486 2006-08-30 00:42 15-alsa.rules
-rwxr-xr-x  1 root root 5380 2006-02-07 17:09 25-lfs.rules
-rw-r--r--  1 root root 1527 2006-08-31 11:17 50-udev.rules
-rw-r--r--  1 root root  120 2006-08-31 12:18 60-local.rules
root@lfs-6:/etc/udev/rules.d# $e/udev start
Populating /dev with device
nodes...                                                             [ 
OK  ]
root@lfs-6:/etc/udev/rules.d# echo $e
/etc/rc.d/init.d
root@lfs-6:/etc/udev/rules.d# ls /dev/d* -l
crw-rw----  1 root audio 14,  3 2006-08-31 12:18 /dev/dsp
crw-rw----  1 root audio 14, 19 2006-08-31 12:18 /dev/dsp1
lrwxrwxrwx  1 root root       3 2006-08-31 12:18 /dev/dvd -> hdc
root@lfs-6:/etc/udev/rules.d# ls -l /dev/c*
lrwxrwxrwx  1 root root    3 2006-08-31 12:18 /dev/cdrom -> hdd
crw--w--w-  1 root tty  5, 1 2006-08-31 12:18 /dev/console
lrwxrwxrwx  1 root root   11 2006-08-31 12:18 /dev/core -> /proc/kcore

As you see the device creates the symlink but refuses to belong to group
cdrom (or any ther group I care to name).

I am looking to use KDiskFree for mounting and unmounting these drives

I have two questions:
a)  How do I permanently change the group ownership?
b)   If I need to safely reinstall udev from source (to 07x or 098),
what precautions should I take without destroying my system?
(other than a giant tar ball?)

=======================================================================================

(LFS udev instructions if attachment kicked off)
6.58.1. Installation of Udev

 Compile the package:
make udevdir=/dev
udevdir=/dev
 This tells udev in which directory devices nodes are to be created.
 To test the results, issue: make test.
 
 Install the package:
make DESTDIR=/ udevdir=/dev install

 The meaning of the make option:
DESTDIR=/
 This prevents the Udev build process from killing any udevd processes
that may be running on the host system.
 Udev's configuration is far from ideal by default, so install the
configuration files here:
cp -v ../udev-config-4.rules /etc/udev/rules.d/25-lfs.rules

 Run the udevstart program to create our full complement of device nodes.
/sbin/udevstart

6.58.2. Contents of Udev
Installed programs: udev, udevd, udevsend, udevstart, udevinfo, and udevtest
Installed directory: /etc/udev