Flash theMAIN MOD through CWM.
Then Install patch made for your ROM..(No need if using Stock ROM)
Then Wipe Cache & Dalvik Cache.
Go to Advanced/Fix Permissions.
Reboot..
ArSaw - For Xperia Z LockScreen Guide
RocketSauce83 - LockScreen WallPaper Changing Mod
charlessxavier & mansoorarb - Beautiful Screenshots
Dark4Droid(Me) :silly: - You know what i did,dont you :angel:
okay guys dont worry. here is a method to set any image as lockscreen wallpaper
root explorer needed
1) Get started with two copies of image you want to set as lockscreen wallpaper
2) Now rename one of them as anyname.jpg and other as anyname_small.jpg
3) Move or Copy both the image files into wallpapers folder located in system/etc/customisation/content/com/sonyericsson/wallpaper
picker/wallpapers
4) Now restart lockscreen app (used for changing wallpapers, located in app drawer) and now you can see the new image. select it set as wallpaper