1.You should start with an empty USB drive so you don't loose your precious information. The format and the size won't matter because the image will be written raw. The only problem is that you can only use 1.38MB of your drive. I named it MENUET, but that will be your choice what name you will give. The most important from this part is to remember the letter of the drive because if you have many of them you'll probably mix them up. One suggestion is to remove all other removable media if possible.
2. I'm using ICY Hexplorer to do all my low-level stuff. You can choose whichever tool you like that can write raw disk data. I've opened up a MenuetOS 64-bit image and you can read that from the header to be sure. FAT12 is the floppy filesystem that its using.
	3. The next step is to copy all the data in the image to the USB disk. To do this you need to select and copy all the data on hexeditor's screen. The easiest shortcut keys are Ctrl+A and Ctrl+C. The resulting clipboard is about 1.38MB as a normal 1.44 floppy.
In this step we will open the drive we would like to write MenuetOS to. The letter of the drive you should remember. If not - check carefully many times - we don't want to write any other drive than this. The disk menu has all the drives it finds in your system and you must pick the drive MenuetOS will be written to. It asks for sectors to read and calculating from the size of a floppy, its 2880 sectors, but usually I just put 3000 in it.
	If it was formated in FAT filesystem, then you will see FAT32 written somewhere in the header. Windows even writes MSDOS5.0 as seen in the picture. If there is any sign of NTFS then triple-check that it isn't your system drive.
When you are ready, you can hit Ctrl+V or find Paste from the menus. Only the copied 2880 sectors will be pasted and the other sectors that were opened just in case are left alone. Now the image on the USB disk is almost ready. In the last step all changes need to be saved.
	This is the last step: There is a "Write Sector(s)" command under the disk menu. There is no shortcut key and for a very good reason. Again you need to be sure you did everything correct, because there is no going back when you hit this button. It will ask you confirmation and you should answer "Yes" if you are sure. Exiting heplorer will ask you another confirmation about saving this to a file, but you already have this image in a file so you can answer "No".
After this you can check the drive in an explorer window and see if it has a bunch of files on it. When this is checked then you can boot with USB drive sticked in any port (preferably USB 2.0 port). Go through the BIOS options to make sure USB-booting is allowed. There are a lot of different BIOSs but if there is a USB-booting option it should be easy to find. Intel usually features a selection of various USB emulations like floppy or CD-ROM, but the newest Intel boards have auto-detection. With Phoenix BIOS you should make many attempts even if it doesn't work the first time. It is possible that CD-ROM emulation on a USB-drive will boot your MenuetOS nicely. Image from Google Image Search	Image from Google Image Search