Questions about the Heroes 4 map editor.

Not quite. Sylvan only has 2 starting points, and the castles are tied to players. My idea is as follows: Let's say there are 6-10 neutral castles on the map initially. And at the start, a player gains control of one of them (it's unknown which one beforehand). Previously, the difficulty was that since the castles are neutral and not tied to a player (with a tie, the choice would be smaller, and having a bunch of native castles isn't very good), there's no guarantee that if a player chooses, say, Sylvan, they'll get that type of castle. But this issue has almost been resolved; I just need to test a few more things.