well what u need to do is open the file. u will get an error from windows saying cannot locate .rar file or sumtinn like tht.
follow the link they giv u to a windows page. on tht page there will be a link to a couple programs. download any (my favorite is winrar).
After the download is complete open the file and it will bring u to a winrar screen tht contains the files of the patch. extract those files to ur desktop or whereever u keep ur patches. then ur done. lemme know if u need more help