Ultimate Boot CD

I've followed the video tutorial on booting from USB using RMPrepUSB. I get all the way to the grub menu and select my boot when I receive this error: (hd0,0) Filesystem type is iso9660, using whole disk Load segment: 0x0 System type: 0x0 Sector Count: 0x4 Load RBA: 0x9A Boot type: 0 = No Emulation ...