Current questions and answers regarding the map editor.

Yeah. And the bridges are just as static. If you managed to get the bridges to work, you'll be able to get this to work too. And, by the way, you don't actually need to do anything with the landscape. Just set the z-coordinate and then don't touch the bridges themselves, even if it seems like they've moved away due to manipulations with the landscape (in reality, they only move visually; their z-coordinate remains the same as it was set, and in the game itself, they don't move anywhere).