Change Lockscreen Wallp for CM (com.ryosoftware.cyanogenlockscreenwallpaperchanger) on Google Play
** This app only works on Cyanogenmod based ROMs** This app requires superuser privilegesWith this app, that is compatible with cyanogenMod based ROMs, you can set the lockscreen wallpaper.To set a specific wallpaper, just open your gallery app, select the image that you want to set as wallpaper then click the share button and select this application.If you want to automatically change the wallpaper using the images in a folder, simply select the folder pathname and the update interval.In any case remember that for best results you must first crop the images to your smartphone screen size.