help with routing

[eluser]huzzi[/eluser]
Hi guys!

I want to route http://www.domain.com/username -> http://www.domain.com/profile/view which i can do with the routing below.
$route[':any'] = "profile/view";

Now how do route
domain.com/account -> domain.com/account/index
or
domain.com/account/update -> domain.com/account/update

Please help.

Thanks in advance.