You might have to be more specific in your question. It is possible, though, to use the map editor to put in a list into a field. For example, if all enemies on the map carry items, and item_list is the enemy's inventory, you can type list("potion", "hi-potion", "x-potion") into the item_list field directly through the map editor. Is that what you are getting at?
I think this is as clear as it gets. I already know how to edit a mob's contents list within the map editor. What I want to know is how I edit a list that I defined within the map editor that may or may not contain text values such as "Hi", or "How are you doing".
Oh, I see. Can't you just do that in the same way you would edit any other list? You can use the locate() or find() procs or some other means of getting your hands of the object, and then you can say enemy.inventory[2] = ... as you normally would.