Set-up USB stick with these directions ...
http://www.freesoftwaremagazine.com/...tro?page=0%2C0
Copy contents of your puppy cd to one of your partitions.
Then configure grub to point to the relevant files that you just copied over.
This is what your grub command should look something like ...
default=0
timeout=10
title PIZZAPUP
root (hd0,4)
kernel /vmlinuz root=/dev/ram0 nopcmcia
initrd /initrd.gz