How to Create a BIOS Flash USB Stick (Non-Linux Vendor Utilities)
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2. Plug in your USB replace /dev/sdb with /dev/[your USB] (if you do not know where your USB stick is try the command lsblk). Prepare to set up a partition table (Warning: this will erase everything on your USB stick.)
mkpart primary 0% 100%
set boot on
3. Add a file system:
mkfs.vfat -F32 /dev/sdb1
4. Now install Syslinux to your USB stick: (refer to your distro package manage for downloading the syslinux package):
syslinux -i /dev/sdb
5. Add a configuration file that will boot your FreeDos Image:
sudo mkdir /mnt/usb
sudo mount /dev/sdb1 /mnt/usb
sudo vim /mnt/usb/syslinux.cfg
6. Copy memdisk to your USB stick. (if you cant find the syslinux lib try the command whereis syslinux.)
sudo cp /usr/lib/syslinux/memdisk /mnt/usb
7. Copy the FreeDOS image and your vendor executable image.
8. To partition the disk you must leave the "Deployment Tools Command Prompt". If you stay in the "Deployment Tools Command Prompt" it will not create a proper bootable partition. Start a separate command prompt with administrator privileges. Replace disk 6 with your USB.:
select disk 6
create partition primary size=<size of device>
select partition 1
format fs=fat32 quick
9. Copy to your USB. Change "F:\" to the location of your drive:
xcopy c:\winpe_x86\iso\*.* /s /e /f f:\
Once you boot, you get a command prompt in a Windows environment.
Now you can navigate to the location of flash utility and install.
I hope this tutorial helps anyone else. It took a while to compile various walkthroughs and Q&As.
1. You cannot add the flash utility directly to the ISO. It has to be mounted into the actual boot.wmi.
2. If the disk fails to boot ensure that the active flag (boot) is set in diskpart.