I have a heck of a problem I have 6 USB Ghost Boot sticks. All are by various manufacturers. They are pretty much have the same info on them except different IP addresses for multicast. My problem is, 2 of them are not bootable on Dell T1500s. It simply won't recognize the USB drives as boot devices. When you hit F12, the USB device isn't an option. However, I can use these same USB sticks in other various models of Dells no problem! Including the T1600. I have a massive upgrade coming up and would like all six going to make my life easier. Any clues?