Quick Question

[eluser]Wondering Coder[/eluser]
thanks for the reply Eric Barnes,

1. What I want is after I submit a form then I will be redirected back to my homepage or to another page(btw-im using redirect function). I've red the _remap says it for controller function, haven't got a reason to use it yet.
Also I have a url:
www.mysite/profile/contact_detail/8
I want to look just like this:
www.mysite/profile //In my site I just want to view 2 segments.

2. Which one is better md5 or sha1 for hashing?

thanks again ^_^