Hmmm, not sure what I did. I found that after booting and getting the blue screen from BartPE, the next time grub wouldn't even work, it would just say try (hd 0,0) fat 16 try (hd 0,1) fat 16 error Or something like that from memory. Then when I plugged my USB back into Windows PC and checked in Explorer one drive had become hidden, a bit of a nuisance. I changed the second partition to the iso method and ramdrive and now the USB boots fine, maybe there was something wrong with my partitions and using the "pe2usb -f f:" command with the -f format switch fixed it? Still end up with a hidden partition which is not ideal. I would be interested in which method you prefer and what your menu.lst file would have, if you use grub as a bootloader, jaclaz.