I emailed plextor europe 2 days ago heres what they said;
You need to include a dos aspi layer and an scsi to ide driver.
This utility is mainly used by larger system integrators who need to use
this utility to update hundreds of units in an automated way. If you are
going to update only a few units it is recommended to use the windows
We do not supply the dos aspi layer or scsi2ide driver these are developed
by other companies to make fully functional multple drive update routines.
We do not supply any more information on this issue as this is all we can
Excelsiorlaan 9, 1930 Zaventem, Belgium