iPhoneLS requires .NET Framework 3.5 or higher, which is built into Windows 7. If you’re using any version of Windows prior to Windows 7, make sure you get .NET Framework 4.0 directly from Microsoft’s download website. Other than that requirement, this screensaver should be as easy to install as any other.
How to install :
Step 1: download iPhoneLS from here. save the file in a safe location (if you delete the file after install, it won't work. so save in a permanent location)
Step 2: Right-click the iPhoneLS.scr that you downloaded and select “Install”.
Again, make sure you do not move this file or remove it after this point. If so, this screensaver will automatically be uninstalled.
Step 3: You should immediately see your Windows screensavers settings dialog, with iPhoneLS selected.
Step 4: Click on Settings to modify the Optional settings such as Arrow Speed, Opacity, Backround Picture.
Step 5: Once you modify the settings click Apply and OK
You’re done! From here on, whenever your computer enters an inactive state, you’ll have to drag your cursor along the “slide to unlock” slider in order to resume use.