i got the laptop dual booting using grub now! not too tricky, but since i had installed linux first, grub didn’t know i was going to install windows xp (obviously) so i had to figure out how to get that working… don’t have that url handy, but /boot/grub/grub.conf goes like this:

default=0
timeout=10
splashimage=(hd0,2)/boot/grub/splash.xpm.gz
title Red Hat Linux
root (hd0,2)
kernel /boot/vmlinuz-2.4.18-3 ro root=/dev/hda3
initrd /boot/initrd-2.4.18-3.img
title WindowsXP
root (hd0,0)
makeactive
chainloader +1

note: to have a sony via (at least the pcg-f430) give a popup prompt menu for what device to boot from, press the esc key twice once the “sony” screen is displayed.