How do i change the theme of my lockscreen on my ipod touch 2g?

its jailbroken with the 3.1.2 software. i have downloaded rock instead of cydia and do have winterboard but when i make changes on winterboard, my ipod would reload but the lockscreen does not change to what i want it to be. how can i fix this?How do i change the theme of my lockscreen on my ipod touch 2g?
Try to refer to the article of http://www.leawo.com/blog/tag/ipod-theme



This article should be helpful for you to change the theme for your iPod Touch.