@intel
install filebox from repos and type these things if you already having sakya's qtlockscreen.You will find your way .
home/user/.config/sakya/QtLockscreen.ini
home/user/.config/sakya/images/
@bigmargio
whenever you find it difficult to install anything which you cant find in devel,all you have to do is to open fapman and then hit the install button and then hit the (c) button ,select advanced packages and you probably will be able to find anything you want .
or apt-get update,apt-get upgrade and apt-get install ( package name ) works .