Man thats a thorny subject. There are two places to
go:
http://www.mediator.co.ukand the hyperion-support list on yahoo groups.
I remember something about needing to install the right
Warp3d from the right Mediator Update ( the latest one probably has it in aswell ) and also you need to use blizkick
to get the powerpc.library on a warm reset.
I have been through your pain several times already and
Ill see what I can dig out from my frantic pleas on the
support lists.