[Grml] How to use the .iso image for usb booting

[T o n g]

Hi, 

How can I put the .iso image on usb so that the usb boots with the latest 
devel release, grml-medium-devel_2008.09.28.iso for example?

The wiki http://wiki.grml.org/doku.php?id=usb & grml2usb uses windoze 
FAT16 filesystem, but I hope I can put it into (and boot from) native 
Linux filesystems, using grub if possible.

thanks

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Tong (remove underscore(s) to reply)
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