Now you can recover forgotten passwords (or know the passwords not known to you) by using a simple software.
Just download 'advanced rar password recovery'. The link is given below

http://download.cnet.com/3001-2250_4-10046812.html?spi=eb9c531aa1697ca16460e73d45ef5ae2

The activation password for the software is
ARPR-83296730531875-CBBVYBXFEXDEVPMB

 Enjoy...