i have read somewhere that there was a conflict between openpci author and elbox so there isn't combatibility with mediator. i have try openpci with a cheap (9euro) usb2 card on prometheus and almost work... all drivers could ''see'' each other but because of dma issues of prometheus never arrived at a happy end.
-edit-
Nickman (from an other post):
Atleast pciscan that comes with the archive works ok with my mediator and lists all the cards etc. And i have tried ArackAttack and a noname USB card. Poseidon sees the card but i can't get it to work. But as i haven't got another card to try with i can't verify if it's the card or the mediator driver that is the problem.
salteadorn (an other one post):
The OpenPCi lib "does" not work well with Mediator. I have already also made tests with diverse USB cards(a NEC USB 2.0 among them) and none has worked with the OpenPci and ArakAtack.