Easy2Boot uses grub4dos and can boot directly from the ISO - no iso-scan/filename= is needed because it uses the grub4dos partnew command.
You can add your own menu for eset using a .mnu file and even have persistence. See 'List of tested ISOs' page for blog articles on Eset ISos.
Press F3 to select a keyboard. You can also try adding
AFTER the end of the line (after ---) for a UK keyboard.
To find the correct kbd string, use F3 to change the keyboard and then boot, then in the terminal type:
and look around the 2