hmm the last words of Archiso tutorial are
You will receive a .iso, ready for burning onto a CD/DVD or for dd'ing onto a USB key:
dd if=my-image.iso of=/dev/some-usb-drive bs=8M
but etc/fstab is currently
aufs / aufs noauto 0 0
none /dev/pts devpts defaults 0 0
none /dev/shm tmpfs defaults 0 0
/dev/cdrom /bootcd iso9660 ro,user,noauto 0 0
fdisk -l lists all partition on your system and we'd have to replace the last entry in fstab for the one corresponding to your USB drive but this can vary from a computer to another (/dev/sdb /dev/sdc /dev/sda) and this would be a "custom solution".
A global solution would be to use the label approach
The iso needs to have a particular label let's say archbang and if you try to boot from usb, your pen drive would need to have the same label
LABEL=archbang /bootcd ....
I'll have to test that solution 
Last edited by willxtreme (2010-01-26 17:34:14)