Thanks for the feedback. I'm a little embarassed at my oversight, but perhaps I can share my experience and some other noob will reap the benefit.
My problem was simply due to having the ISO emulation mode set to system menu and not direct load. Once I did that, most of my iso that I generated following the procedures worked.
A few didn't, however. I will be perusing to see what else I can learn.
Keep up the great work!