Problem booting Redhat 9 from USB flash drive

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http://www.linuxforums.org – Hello all..:D I have a good Redhat 9 install on my hard drive. But I need to use this install on another computer. So I formatted an USB flash drive as ext3, installed grub in it and copied my existing / filesystem on the hard drive to the USB flash drive. For testing the install, I disabled my hard drive, floppy drive and CDROM drive in the BIOS setup. Grub came up properly at boot time. I could find my filesystem on the USB drive from the GRUB command prompt. The TAB key shows all options correctly But when I tried to boot it shows this error message Please append a correct "root=" boot option Kernal panic: VFS :Unable to mount root fs on 00:00 I changed the "root =" option in the kernel line to all possibilities(hda1,sda1,hda2,sda2,hdb1,sdb1 etc) and the same error repeats with only the 4-digit address after fs different. I dont have a seperate partition for /boot. I tried without the root option. It is still not working. Any help would be really appreciated.:D (HowTos)