How to Jailbreak iPhone 4

1, JAILBREAK
http://appleblogger.net/2010/10/10/tutorial-how-to-use-limera1n/

2, Go to cydia, manage, sources to add following
http://cydia.hackulo.us/
http://app.weiphone.com/cydia/
http://apt.178.com/

3, Go to cydia, search, to install following
afc2add, appsync, installous, MobileTerminal, cydelete

4, iPhone will reboot several times

5, Run Mobile Terminal, to change root password
http://cydia.saurik.com/password.html

6, From installous, run search to find applications to install