In order to strip the CZ-97B, you'll have to move the slide. You'll want to cock the hammer back pre-emptively, to make it easier.
Once the hammer is cocked, you'll want to push the slide back slightly and grip it with your hand (as shown) in order to lock it in position. Note that there's a line on the top of the slide and the frame, visible just below the rear sight. When those two lines are in alignment, your slide is in the correct position to push out the slide stop.
Without releasing the slide, you'll want to turn the gun over and press the protruding piece my thumb is over. I do recommend using your thumb so that you can put some extra force on it. On a side note, immediately behind the top of the barrel there's a small metal rod which is, in this picture, flush with the top of the slide. This is the loaded chamber indicator, which is a California-mandated safety feature. When a round is in the chamber, this indicator sticks up a little bit.
Before you can remove the barrel, you'll need to remove the guide rod. First press it towards the muzzle, and then lift it up. You'll note that there's a machined spot in the bottom of the barrel for the guide rod to nest on.
As soon as the bushing is gone, the muzzle nut may be removed. This is a very mechanically interesting aspect of the CZ-97B's design. It's of particular interest to Californians, because a threaded barrel is a prohibited assault weapon feature on pistols in that state. The interesting thing is that the barrel itself isn't threaded, while the muzzle nut actually is.
Another view of the muzzle nut partially unscrewed. The fascinating thing for Californians is that if you were to construct a replacement barrel bushing with a compensator or other muzzle device on it, you'd have all of the accessory options of a threaded barrel without breaking the threaded barrel law.
The muzzle nut, separated from the slide. Note the six scallops around the edges of the nut. CZ ships a special tool with the '97B to remove it, but it's not strictly needed because the muzzle nut doesn't require a lot of tension.
Removing the muzzle nut. Note that you can do so without taking the slide apart first, just by pressing in on the barrel bushing to unlock the muzzle nut, then turning it as necessary.
-- SeanNewton - 20 Sep 2012