Using multiple Presonus Inspire 1394's with GB

I've bought 2 Inspire 1394's to use with GB as i want to record discussions/debates for a podcast we're doing. I have 4 x B2-Pro microphones that i want to record. Each Inspire has 2 x XLR inputs. However, in GB (and also Audio/Midi setup) I can only select one of the two Inspire's for the "Input". The problem in GB is that when i select "channel 1" as the given input on a track, it won't know which Inspire channel 1 is related to.

If anyone has experience in using multiple Inspire 1394's with GB, then it'd be great to hear from you!

Cheers,

Grant.