Can someone explain to me the "Load Next Scenario" action. Does it work? How do I use it? How does it work? Is there any usefull that could be done with it?

Thanks.

It loads a scenario in the same folder(?) as the map that runs it, it only works in 1-player.

It loads a scenario relative to the map's original folder.
You can load maps even if they don't have the scm or scx extension.
The trigger action is ignored in a multiplayer game.

I'm not sure about its use in the official campaign, but the information might be helpful.

Can it load .chk then? Or did you mean that it doesn't matter if you're going from .scx to .scm?

No, it can't load chk, he's saying that you could have any extension you want, as long as the file is actually an SC map.

SC maps are just mpq archives.

...
In map mod loader anyone?

I DEMANDS TEST