Installing Skin Installer Ultimate
Update: This guide has been updated for the new LoL versions. Please see the next chapter for details.
Download a third party client called Skin Installer Ultimate (SIU). Skin Installer Ultimate (SIU) is a program made to help you easily install and uninstall skins in the League of Legends video game. Link = https://sites.google.com/site/siuupdates/
Step 1 : Once you have Skin Installer Ultimate install create a new folder on your desktop, Open the downloaded file, Select everything in that folder (Ctrl + a), then drag and drop into the newly created folder on your desktop.
Step 2: Open "SkinInstallerUltimate.exe" Once you open this it's going to ask you to find your lol.launcher.exe which is located in your Leagueoflegends folder.
Now you have your Skin installer installed and ready to install skins. It should now look like this.
s