You can use Python to do online play.

Execute file action in the File object.

Yes, use the action to change it.

Set it back to nothing like it was?

It's been working for a long time.

Search the forum for this, there's been a lot of topics on it.

The INI object, the system actions, and other objects like arrays etc are all ways to do it.

Whilst most objects can be figured out, the Wiki also contains some explanations, as well as there being numerous .cap files in the upload forum to look at.

Physics collision masks interact with other physics objects, and custom collision masks for normal objects with other custom collision masks. The two do not interact, so to speak.

Direct-X DLL's couldn't cause it, better to post a .cap of the problem.

It could be done quite easily via a plugin, there's numerous command line parsing classes which could be implemented fairly simply.

Seems pretty simple, put it on the request tracker.