Loading a Sprite (Unity 4.3) in resource folder and setting it in sprite renderer

Hey Guys, I have a SpriteSheet which I imported in Unity so I have a basic Texture2D asset which is separated in multiple sprites which are named like (sprite_0,sprite_1, etc.) Im trying to set the sprite of my SpriteRenderer in code but I want to be able to load a sprite dynamically, not have to link it in the script directly. So I have a Resources and a Textures folder within it. I’ trying to ge