* In order to create a bootable DOS disk you need only the The Firmware Flashing Bootdisk fromThe Pioneer Region Free DVD firmware page

* In order to create a bootable DOS CD disc you need only the The Firmware Flashing Bootdisk fromThe Pioneer Region Free DVD firmware page

As NIL describes:

Those are Windows Millenium Boot disks (780 KB each), that you can use:
o To boot in the proper DOS mode required for flashing
o To upgrade your firmware on a laptop where you can only have the floppy unit or the DVD unit at a given time
o To access NTFS partitions (NT/Win2k/WinXP) from DOS
o To know the position of your IDE DVD drive (primary slave, secondary master, etc.)
o To access your SCSI DVD-Drive for flashing (if you are using a common SCSI adapter)

Prior to using thoes disks, you also have to download both the fimware and the DOS flashing utility, and put them on a harddisk partition.

To burn the CD ISO, use a tool like Easy CD Creator, Nero or FireBurner.