Create USB Bootable
On Desktop, right click on the USB icon, then select "Format".
Select "Disk Utility".
Enter label name and select FAT then select Create.
Select "Create".
[david@hp-lap ~]$ su
Password:
[root@hp-lap david]# grub
Probing devices to guess BIOS drives. This may take a long time.


GNU GRUB  version 0.97  (640K lower / 3072K upper memory)

[ Minimal BASH-like line editing is supported.  For the first word, TAB
lists possible command completions.  Anywhere else TAB lists the possible
completions of a device/filename.]
grub> device (hd0) /dev/sdd
device (hd0) /dev/sdd
grub> root (hd0,0)
root (hd0,0)
Filesystem type is fat, partition type 0x6
grub> setup (hd0)
setup (hd0)
Checking if "/boot/grub/stage1" exists... yes
Checking if "/boot/grub/stage2" exists... yes
Checking if "/boot/grub/fat_stage1_5" exists... yes
Running "embed /boot/grub/fat_stage1_5 (hd0)"...  27 sectors are embedded.
succeeded
Running "install /boot/grub/stage1 (hd0) (hd0)1+27 p (hd0,0)/boot/grub/stage2
/boot/grub/grub.conf"... succeeded
Done.
grub> quit
quit
[root@hp-lap david]#
Mount the USB device, copy the /boot directory to the USB device (do not
overwrite the current files). Then following these commands:
Example of grub.conf or menu.lst file.
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,0)
#          kernel /vmlinuz-version ro root=/dev/mapper/vg_hplap-lv_root
#          initrd /initrd-version.img
#boot=/dev/sda
default=0
timeout=12
splashimage=(hd2,0)/grub/splash.xpm.gz
hiddenmenu

title Fedora (2.6.29.6-217.2.16.fc11.i686.PAE)
 root (hd2,0)
 kernel /vmlinuz-2.6.29.6-217.2.16.fc11.i686.PAE ro root=/dev/mapper/vg_hplap-lv_root rhgb quiet
 initrd /initrd-2.6.29.6-217.2.16.fc11.i686.PAE.img

title Windows Vista hd1
 root (hd1,0)
      makeactive
      chainloader +1

title USB hd0
 root (hd0,0)
      makeactive
      chainloader +1

title Fedora hd2 (2.6.29.4-167.fc11.i686.PAE)
 root (hd2,0)
 kernel /vmlinuz-2.6.29.4-167.fc11.i686.PAE ro root=/dev/mapper/vg_hplap-lv_root rhgb quiet
 initrd /initrd-2.6.29.4-167.fc11.i686.PAE.img

title Fedora hd3 (2.6.29.4-167.fc11.i686.PAE)
 root (hd3,0)
 kernel /vmlinuz-2.6.29.4-167.fc11.i686.PAE ro root=/dev/mapper/vg_hplap-lv_root rhgb quiet
 initrd /initrd-2.6.29.4-167.fc11.i686.PAE.img
Select "Bootable", type "FAT16 (0x06)" then "Apply".