Basically, all you have to do is unzip a folder, modify image in photoshop, save and rezip the folder. Pretty easy. Make sure you are saving the file as .png.
Have you tried downloading skins from within the app? They have a big selection, if your trying to add in your own then I'm not sure why it is giving you trouble BUT if you contact the dev he should be able to help you and he has always responded very quickly.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.