I reccomend using WinRaR or 7zip for unzipping the folder (both are free) I use 7zip myself and all you have to do is Right-Click > 7Zip > Extract Files Here.
I'd love it if you changed the rar file to a standard zip so folks (by which I mean me, and the person you replied to, and anyone else who gets confused by the rar extension) don't need to download a separate application to open it.