[Blind-sysadmins] Has anyone around here booted a Dell PowerEdge server from USB before?

Hi all, I'm curious if this has ever been done by any of you guys. I'm trying to figure out how to do this with my server right now, and I can't. I have a video up on YouTube (my sighted friend is reading the options to me as we move along), so if anyone can offer feedback via the video, it would be great. I can only get the server to boot consistently from the hard drive; I don't see an option for USB. Any feedback is much appreciated.