Do you mean a failover thingy, or a trunking config?
Either way, Im not sure if it can be done in any "official" way with two different NIC's.
I think your easiest solution would be to get one of their NC3134 NIC's, its the dual port model(or 4 ports with a daughterboard addon), they have native support for trunking, and I'd assume failover(Never used failover, but Im pretty sure they can handle that too).