how to create iso image from dvd-rom???

[alaa]

hello fedora people,
i have the fc6 on dvd but i want to take a copy of this dvd on my hard disk as iso to install from the hard disk.
the problem that i cant copy the disk as iso by nero.
so if anyone knows a way or a program that can perfectly create the iso image from the disk,please tell me.

thanks.

[Brian1]

Example of using the dd command. http://www.granneman.com/techinfo/linux/burningcds/makeanisoimage.htm

Brian

[alaa]

thanks brain1 ,but i cant use this command now because i am on windows xp not on Linux yet.