boot from cd, point to thumb drive

[Jim]

I've got a computer with a Gigabyte P35-DS4L revision 1 motherboard in 
it.  The boot options include USB hard drives, but it won't boot from a 
USB thumb drive.  It will boot from an optical disc.  Can someone tell  
me how to make a boot CD that would  then point to a USB thumb drive?  I 
don't want to have to go back to burning dozens of boot discs.

I looked online and found many references to Gigabyte boards not booting 
from USB.  I found many people who had the same problem, and some 
solutions for revision 2 of this board, but none for revision 1.

thanks