Flash key is a bit of a waste of time. It will not boot from the flash drive, just comes up with Amipup.sfs is missing on bootup even though it is there, it will boot from live CD though.
I have tried cloning to 3 USB flash disks, 2 SD cards and a Compact Flash to no avail, same error of missing sfs file. I also tried installing from live CD to the same media with the same results. The same USB keys and flash cards work fine in the live CD environment, so it is not a issue of missing drivers or such.
I haven't tried the different boot options yet I will have a go with them now, but it's odd that it works fine from CD but not from USB, must be a error in the boot files somewhere, will investigate a bit over the next couple of hours.