There is obviously a bit more to USB flashing than it appears. The actual breed of USB stick appears to be critical. Of the two I’ve tried, a Lexar formats OK but refuses to boot (with 1.15 BIOS) and another generic unbranded one will format with the regular Vista tool but USB_format.exe insists that its write protected (its definitely NOT).
The Wyse USB manual lists only 5 tested/supported USB sticks. Three from SanDisk [Cruzer micro 1, 2, and 4 GB) and two from Kingston (DataTraveler 4 and 8 GB).
The manual implies that not all USB sticks may work and says to try a different brand if a particular stick doesn’t work.
I’ve tried two different Kingston 4 GB DataTravelers: one is a black one with a retractable USB plug – don’t get that one as the plug won’t stay out without holding the switch that retracts/extends the plug and the second is a purple and white one that comes with a USB cap.
As a side note, I think I was warned by another thing client vendor (not sure if it was HP or Devon IT) that USB imaging might not work with all USB memory sticks.