Works on all ICS roms which supports xperia lockscreen.(will not work on miro,tipo,j if you didn't install right framework).
Minimum RAM usage is 2,5 MB (If you choose image from Xperia Wallpapers - probably will be 15 MB) and unfortunately no swipe notifications.
Don't try to install - put to system/app, set right permissions and reboot.
It looks like this in 480x854:
Thanks to SpaceCaker for his helps and other testers.
If you want permanent "slide-to-unlock" text - Don't forget to delete "(2)" at the end:
If you don't want to see it after 3 unlock: