You'll find the &rawwrite.ttp; program in the same directory as the floppy disk images. Start the program by double clicking on the program icon, and type in the name of the floppy image file you want written to the floppy at the TOS program command line dialog box. There is no MacOS application to write images to floppy disks (and there would be no point in doing this as you can't use these floppies to boot the installation system or install kernel and modules from on Macintosh). However, these files are needed for the installation of the operating system and modules, later in the process.