When Tails OS boots, you can press tab to modify the startup options. Is there any way I can save an iso with these options already set? It's a real pain to have to press tab and set them up every time. Surely there must be a better way?
Chainload the ISO's bootloader using
syslinux, then you can add all the extra parameters you need. Use the actual contents of the
syslinux directory in the ISO as a base.
There are many examples online. Check this one.
There's actually another way to do it by remounting the live disk as writable
mount -o remount -w /lib/live/mount/medium
and then editing the live config file corresponding to your architecture (either
more info here