How do you extract multiple RAR password protected files?

I don’t want to type the same password every time I extract 100 files. I heard there is a command line such as “unrar x -p<password>…” to do this, but when I run that, I get an “unrar command not found” error in CMD. I have WinRAR 4.01 installed. Any help would be greatly appreciated.
Answer #1
just use normal winrar and set the default password under the file menu
remove it afterwords or all your files will use it
Answer #2
Thanks! Never knew that function was available. Google search only mentioned the command line. I need to search harder.
Answer #3
could use Jdownloader.it saves all passwords for different files/downloads.
Answer #4
Thanks! Never knew that function was available.
yup, not well documented
I originally thot it was just for rar’ing and not un-rar’ing