Mynach,
The Service Center 6 CD is bootable and you have to have the MUD (Multipurpose USB Device) inserted in the system for it to work. If the machine is capable of booting from a USB key the MUD is also bootable.
There are some legacy machines that will not recognize the MUD from BIOS / DOS. In these cases please call sales and request a service center 5 CD for legacy systems. This CD does not require a MUD.
On any system please check the BIOS settings for USB devices, if available allow booting from USB devices. This setting will usually turn on BIOS support for USB devices allowing the DOS product to access them.
-Fred