I will insist on this:
ArakAttack supports most of USB2 PCI cards (Spider1/2 included as it's a standard NEC card) using OpenPCI. Registration costs 20 Euros.
Mediator *is* supported by
OpenPCISo, what's the problem with Mediator? Simply register ArakAttack and Poseidon. Since you can buy a standard PCI card, it's around 25 Euros cheaper than buying a Spider.
If you already have a Spider you can register Guido Mersmann's ArakAttack and continue using it.
BTW Guido's ArakAttack is *faster* than Elbox driver in the same hardware.