Alternative to success messages

[eluser]sacarias[/eluser]
Hello all,
i was wondering if there is an alternative to the success message page that codeigniter pushes using.
ex. Success Page in Form Validation

I dread redirecting to another page to tell errors/success. i would rather stay on the original page and output the success message.

another example...
at the singup of my website, i require an email, and the email must be verified.

so after signup form is submitted it will not redirect but rather display a success message telling the user to check the email. i know this is possible in other code, but not sure in CI.
Thanks for swift responses.