If you're running OS X, get UnRarX.
Make sure ALL 47 files are in the same folder, and make sure NONE of them have been renamed.
Then open the first file in UnRarX, and wait. UnRarX will show you as it's running which files it's extracting at which given time. Don't touch anything until it's done (this could take a little while). Then, the files should be extracted to a new folder in the same folder that the RAR files are in.