change the URL to something more friendly

[eluser]mistress_shiira[/eluser]
actually want i wanted to reflect is this:
http://localhost/CodeIgniter_1.5.3/index.php/Admin /main

where main is the name of the view file loaded after successful validation
i dont want it to reflect the name of the function that did the validation.

much better if i can achieve this URL:
http://localhost/CodeIgniter_1.5.3/main

thanks a lot!