How to reset the administrator's password in the file registry

If you forget your WebSphere Application Server administrator's password and/or your WebSphere Portal administrator's password, and your administrative users are stored in the file registry, how can you reset the forgotten password in the file registry?

Here is the way how you can achieve this.

http://www-01.ibm.com/support/docview.wss?rs=688&context=SSHRKX&dc=DB560&dc=DB520&uid=swg21392427&loc=en_US&cs=UTF-8&lang=en&rss=ct688websphere