Connecting cellphone provider usb card to Airport

I'm wanting to dump my internet satellite provider for my cell providers usb wireless card. I have both a Mac and PC (both desktops) running through the Airport. Will I be able to plug the wireless card into the Airport and work both computers or will I have to reconfigure my whole set up? My provider said they sale routers for the cards for $249 but I hate to go through the extra expense.

No, you can't run the data card through the APX. However, there are two other options you could do. You can buy a specialized router like the one from Cradlepoint. Or you can share your Internet connection on your computer.

How would I set it up to share?