Loading files externally?

I would like my game to load sprites from the application folder so that textures can be modded? Any help on this?

Two possible ways:

1) Use "load animation frame from file" (a sprite's action under the category 'animation')

2) Use the image manipulator object. The actions "load image" and "copy to sprite" will be needed here. (you might also need to flip the image, i think it will be stored upside down on load)

Thanks!

Also how can I make a sliding door, as in a door that slides up slowly, then back down and for having buttons that activate it, could I just make another sprite, make it always center on the player and be the player's "hitbox" and have it so that whenever it collides with the button it triggers?

And last but not least, how would I be able to load the sprites and play them as animations, basically I want to be able to put the loaded sprites into different animations and be able to play them.