activewire inc

HI
I wanted to know if anybody has any idea about how to interface PTB
and Cerebus Recording System by Cyberkinetics Inc.
That is ,the display processor (PTB) and recording processor
(Cyberkinetics).Do I have to use activewire inc.
I know how to send a command from matlab to cerebus when in the same
processor however not sure how to do it between processor.
ANY insights will be appreciated.
THANKS

Susmita Chatterjee
Visual Processing laboratory
PI:Dr Grzywacz
USC