Quick If you know what you are doing
I was looking for around for a program to unzip rar files for brushes to use in photoshop. I found this gave it a go an had my brushes in 5 minutes.
When it opens close the archive window. Click open and go look for your rar file. Itll open 2 windows. Pick the one with the most files as thats usually the contents instead of the folder. Just drag and drop it out of the window to the location you want and wallah!
MarsWasHere about
iZip Archiver