I can answer the Bonus Question:
1. Create two identical zones.
2. Link the Zone #1 to Zone #2. With the "primary" Zone active, go to Player -> Zones -> Link Current Zone -> Link to "secondary".
3. Start your image slideshow playing back in Zone #2
4. Detach the display, move it to your second monitor and make it go fullscreen (note: you only need to do this once, it will remember the setting from then on)
5. In the main MC UI, which you can see now that your fullscreen playback is on the secondary display, switch to Zone #1. Since the zones are linked, the slideshow will ALREADY be playing in Zone #1, usually in the Action Window's player.
6. Set Zone #1 fullscreen on your first monitor.
This will play back an image slideshow with the two zones linked, so the playback should match. It won't be perfect down to the millisecond, but it works pretty well.