Creating a Bootable USB Stick

I've downloaded OEL 5u4 and created an ISO image on a DVD drive.  I've installed this on of my test servers but come to find out that the other server does not have a DVD drive but a standard CD-ROM.  Goal is to try and create a bootable USB stick.

Put DVD into drive.  If DVD mount, un-mount it.  OEL 5u4 automatically mount the DVD.

# umount /dev/hda

Put USB stick in USB and copy the contents of the DVD to the USB stick

# dd if=/dev/hda of=/media/disk/install.iso

This should work...