url rewrite ninja .htaccess

Hi everyone!

I need some help to configure my rewrite rule for these url :

I want point my browser some url and the apache forward it to another
url like bellow:

http://www.test.com/start forward to http://www.test.com/action/start.php

http://www.test.com/user/delete/1 forward to
http://www.test.com/action/user.php?action=delete&id=1

And i need this too:
http://fred.test.com forward to http://www.test.com/action/user.php?action=profile&login=fre d

Anyone can help me with this ?

Thnaks to all !
Bye !