Floppy

To use the floppy image insert a blank disk in the 1.44 MB floppy disk drive.
Open a command prompt and navigate to the directory where the files are stored.
Type 'dd if=ucode.dd of=/dev/fd0'.
Boot the xw4200 to the created floppy disk.

CD-R
To use the ISO file , burn ucode.iso to a blank CD-R media.
Open a command prompt and navigate to the directory where the files are stored.

Type 'cdrecord -v eject -speed=16 dev=2,0,0 filename=ucode.iso'

Where dev= is the device address for the CD recorder that comes from:

'cdrecord --scanbus'

