Yeah, you'd use SPCHR (The format is 'SPCHR Control Number, U, V, width, height, attribute' I think) but remember, if you do not specify the width or height it will default to 16 by 16. This means a 24*32 sprite, for example, would change to a 16*16 one. SPCHR also keeps the sprite color, rotation, scale, etc. values how they were (a sprite made red with SPCOLOR will stay red, etc.)