I did that and I have the following 6 boot devices.
1)USB CDROM (which I do not have installed)
2)USB FDD which I presume is the floppy -- again I have no floppy
3)USB HDD which I presume is a Hard Drive -- again no hd attached.
4)IDE0 which is my HD
5)IDE1 with nothing attached
6) Network Boot : Atheros Boot agent.

I have a wireless logitech mouse attached to one of the usb
I have my ham radio connected to the 2nd usb
and I have a 2G stick on the 3rd.

I formated the 2G to fat (hopefully fat32)
I have unebootin on another drive which I tried to load ubuntu on but it
keeps telling me that there is no usb drive installed or it needs to be
formated fat32. I already did a format on it (but it didn't specify
16,32 or whatever.