Time limit for registration?

[Ichiller]

How long time does a new user have, before the registration-code/confirmation mail/ confirmation link gets invalid.
If indefinatly, is there any way to limit the time, say 1 week or so?

[humvee]

Greater control of registration and membership in general can be achieved utilising an extension such as Community Builder - check out the http://extensions.joomla.org pages for details of this and more.

[dhirajghai4]

How do I go about changing the registration informatin to add more fields.

This is standard joomla 'Create An Account'
Registration
Name: *
Username: *
E-mail: *
Password: *
Verify Password: *
Fields marked with an asterisk (*) are required.
Register

I need to add like 20 more fields...