For the first time ever I am trying to create a bootable USB stick
based on a FreeDOS ISO. But I want an additional program available to
the booted OS.
Unfortunately, neither the unmodified iso, nor the one modified as
described below, work.
I have attempted to do the following:
loop mount the ISO
copy all files to a new directory
copy the new program into a directory with all the others
run genisoimage as below
The result is a stick that boots as far as a boot selection menu, but
whatever is selected, it just goes back to the boot selection menu. As
far as I can tell it successfully loads ISOLINUX.BIN, then tries to
load ubninit but that fails.
What am I missing? I've read about a thousand how-tos and none of them
does what I need.
Here's the genisoimage command line I'm using to create my modified