To make a bootable flash drive with the HP Utility, follow the instructions in the Asus Maximus Formula to Rampage Formula conversion thread (relevant part quoted here for convenience). The flash drive I prepared this way has been tested and boots in the Rampaged Maximus, my EVGA 790i, and my Gigabyte P35-DS3P. I can't guarantee it will work on a BlackOps as I don't have one to test it on, but I don't see why it wouldn't work.
Quote Originally Posted by kup View Post
1: Download the HP Bootable USB Utility from here:

2: Download the Boot Files from here:


5: Run the HP Bootable USB Utility and tick the "Create a DOS Startup Disk" option. Now navigate to the Boot Files (extract them first) and select the Folder you extracted them to.

6: Click "Start" within the HP Bootable USB Utility and it will make your USB Stick bootable.