configure yaboot to bootstrap USB devise--

[marco giardina <mailing@giardina-software.org>]

Hello list,

plese and sorry for the stupid question, but i am absolute new about
yaboot. My goals is to bootstrap from an usb devices. My procedure to
make this is:

1 - mac-fdisk create and configure spaces for the distro
2 - mkofboot -b /ddev/sda2 -o usb --nonvram -v (to install uaboot files
on /dev/sda2)

This is the yaboot file generated when launch mkofboot -b ecc ecc:

boot=/dev/hda2
device=/pci@f4000000/ata-6@d/disk@0:
partition=4
root=/dev/hda4
timeout=100
install=/usr/lib/yaboot/yaboot
magicboot=/usr/lib/yaboot/ofboot
enablecdboot
macosx=/dev/hda3

image=/boot/vmlinux
        label=Linux
        read-only
        initrd=/boot/initrd.img
        append="quiet splash"

image=/boot/vmlinux.old
        label=old
        read-only
        initrd=/boot/initrd.img.old
        append="quiet splash"

Weel..

1 - Is it ok this file, or i'll modified some thing inside?? I would
like boot from my old USB HD, and it's on list as /dev/sda. The
directive boot=/dev/hda2 is correct or may be it will be changed
boot=/dev/sda2??

2 - For the kernel i download from ppckernel.org a precompilied kernel
2.4.x. I follow the istruction how to copy all files inside the
devices /dev/sda only is missing the file initrd.img. How can make to
generate a file initrd.image??

Please does anyone can help me??
TIA

Marco