Are any of the NWA "zone" coupons good on Continental flights? I've seen some of them say something about "select partner" flights.

We want to get from the Midwest to MFE, BRO, or HRL, which are served by Continental, and it's a long drive from SAT, which is the closest airport served by NWA.

(We're in MSP, but it can sometimes be worth the drive to DSM, where we board a flight back to MSP.)

Any advice would be appreciated!