So, the rulebook is kind of mum on the subject of sword-and-board style shields, not mentioning how they work mechanically. In my games, I've treated them as Armor (2 or 3, depending on size) when used with the Weapons skill on defense, and allowed one to roll Weapons to defend against more things, mainly claws, Fist attacks and the like, bullets occasionally--basically anything you could realistically get a shield in front of if you had one.
How has this been handled in other games? I saw the Shield Carrier stunt in the master list, but I feel like you shouldn't need to have a stunt to benefit from having a shield, just like you wouldn't need a stunt to wear Kevlar or plate. Unless that stunt stacks on top of the shield's normal Armor rating, in which case disregard that last sentence.