Please forgive using the "borrowed account" from bugmenot, but I felt I had to offer some assistance while waiting for my own account to become active. T$unami
OK I am using Ubuntu 8.10 booting through grub4dos with persistent on my USB stick, my menu.lst looks like this;
CODE
title Ubuntu 8.10 Live with persistent
find --set-root /casper/initrd.gz
kernel /casper/vmlinuz locale=gb preseed/locale=gb kbd-chooser/method=gb console-setup/layoutcode=gb boot=casper persistent rw splash
initrd /casper/initrd.gz
boot
Please note the inclusion of my prefered keyboard layout GB, to have it set back to the default use this instead;
CODE
title Ubuntu 8.10 Live with persistent
find --set-root /casper/initrd.gz
kernel /casper/vmlinuz boot=casper persistent rw splash
initrd /casper/initrd.gz
boot
Any how to use the persistent feature you require a file called casper-rw to be placed in the root of the usb stick
The file "casper-rw" can be ripped from;
CODE
http://www.pendrivelinux.com/live-ubuntu-810-usb-persistent-install-windows/
in the file u810p.exe
Beware it is quite large 1.2gb, but it will give you storage to play within the Live environment on your USB stick. There is also a utility out there to create larger casper-rw files upto a max of 4gb with fat32.
Have fun
T$unami