I am trying to use USB_Multiboot3.cmd and in the menu list, I can't seem to designate my USB-drive

In the menu, I have chosen "Change USB-Drive Target" and I then designate my USB stick which I have formated with PeToUSB accordingly to the settings stated in the help text (Enable Disk Format, Enable LBA(FAT16X), Enable File Copy)

It then states that "***** F: has NOT FAT FAT32 or NTFS Format and is NOT Valid *****"

I have tried both of my Sony 4GB USB stick and my Samsung 1GB USB stick and they all give me the same results..

Help plz

Solved
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This process requires fsutil.exe in the same directory as the USB_Multiboot3.cmd file.
Copy and paste and all is good

I'd rather think your PATH variables are messed, fsutil shouldn't have to be in the same folder.
Try to delete it, extract this archive, say in c:\FIXPATH, open cmd in that folder and run FIXPATH.EXE or just use explorer to run it, let it finish, reboot and try again USB_multiboot script. Please report if that helped.
http://www.westmesatech.com/files/fixpath2.zip