I am having a heck of a time trying to make a simple Windows XP installation USB.
I am running Ubuntu 16.04LTS, and am attempting to dual-boot install Windows XP Pro X64 on this same machine (using BIOS). I have made USB install media before using various methods including Rufus, Etcher, WoeUSB and Unetbootin. This time though, I have been trying for 2 days using all of these tools, formatting the USB in various formats, various XP.iso's, and been unsuccessful to even get past GRUB-rescue. I even used Rufus on a Windows 10 machine to try and make the bootable USB to no avail.
So I am sitting here, thinking there has to be some kind of way to skip the tool's automated systems and just manually build this darn USB install media. I have a good .iso from XP install media, I just need to tell GRUB how to look for the files. Right?
I have been reading the GRUB2 manual, but it is a little hard to join all the pieces I need together for this specific scenario. So I guess my questions are:
What file format (FAT32, NTFS) should I format my USB to?
How do I "install" the GRUB bootloader to the USB drive?
What is the best way to configure GRUB to manage booting to the Windows XP install media on the USB?
If there is a better method to achieve this install, I am all ears! I just figure furthering my understanding of GRUB would be beneficial regardless.