I am learning how to animate a sprite, so the sprite sheet image is foud online. Problem is that I also need the plist file, which I don't have. I tried Zwoptex, but seems not work.
Any one got any idea? Thanks.
You can also go for the Texture Packer to create the Sprite Sheets as well.
For Tutorial with Spritesheet from Ray Wenderlich Demo, you can use to the Resources and play with the Sprite sheet Animations. It would help you to learn making the Animations.
Regarding already created sprite sheet you need the plist from who-so-ever have created the Sprite Sheet
OR
you need to create the chunks using Photoshop and create a newer Sprite Sheet.
All I can suggest these options.