I have noticed that there are several people on multiply who can't figure out how to unzip rar files and my solution is this.
I use a completely free program to unzip .rar files. It is called 7-zip and you'll find it here:
http://www.7-zip.org/Jeg har sett at det er flere som har problemer med å pakke ut rar filer. Og løsningen er et helt gratis program som heter 7-zip. Det kan lastes ned herfra:
http://www.7-zip.org/