Does anyone know what the script command is to open a container that is located somewhere in the world?

Maybe use http://www.creationkit.com/Activate_-_ObjectReference function? I think it would only work on a container that is somewhere in the loaded cell though.

Yes--Activate is what you want. It works on containers outside the current cell as well (in which case you'll see it be called a "remote activator" by some people).

Nope did not work, tried adding a property (object referance) to the activate command as to open the container but nothing happens.

Maybe show your script?