GRUB non-EFI Boot Menu
Use this option to add an additional menu item in the boot menu for the ISO, which will allow an automated install after setting preferences and potentially using any utilities on the standard boot menu.
This is for legacy (non-EFI/BIOS) systems.
Alternative Configurations:
6default custom-saltstack
7label custom-saltstack
8 menu label ^Install Ubuntu Server w/ Saltstack minion
9 kernel /install/vmlinuz
10 append file=/cdrom/preseed/ubuntu-saltstack.seed vga=768 debian-installer/language=en debian-installer/country=US console-setup/ask_detect=false keyboard-configuration/layoutcode=us debian-installer/locale=en_US.UTF-8 localechooser/preferred-locale=en_US.UTF8 initrd=/install/initrd.gz quiet ---
Note
This assumes you place the custom entry first. Adjust default accordingly.
Proceed to Create Preseed Installation File