The clothes are on separate layers. You'll need to look up a tutorial on how to build a "paper doll" system for your player sprite if you want to change outfits at runtime. Otherwise, just use an image editor (GraphicsGale is free) to flatten the layers into a single sheet.
Thank you. Even I understood how to wear the clothes to the character but don't have graphic programs as photoshops so I was worry how to solve this problem. Thank you!
