I've got a 4 Gigabyte flash drive that I'd like to make bootable. For right now, I need it to boot DOS or DS linux. I'd like to have it boot to grub or something similar so I can select either one ...

However, you can use Ventoy2Disk, which is a free tool to create a bootable USB drive without formatting. You can create a multiboot USB drive with the help of this freeware.

How to make a bootable USB drive If you're trying to install a new operating system or flash your BIOS, you're going to need a bootable USB drive - here's how to make one.

I have a USB that is bootable to DOS. I want to know if I can add a way so that when DOS is fully booted up a script will be automatically run so that I don't need a keyboard or monitor.

Need installation media to reinstall Windows? Here's how to create a bootable CD, USB, or DVD with an ISO from scratch!