[Q] How to create a theme for galaxy fit?? topic

I have knowledge about programming, creating android games and live wallpapers but have little knowledge about programming of rooted devices and related. I know creed's rom is very good and I use it almost daily, I want to make a theme for my phone, as I would be making some cool graphics. If it turns out to be succesful I would also share with you. Can you tell me how to make one? I looked and found three themes for creed's rom. Also I don't know what ddk??'s mean. I heard that you just have to change some images in some specific files like framework, theme.zip etc. with custom images, that would be easy? Would you help me?