Outlook doesn't support importing to a custom form. You'd have to write custom code or use a third-party application. See http://www.outlookcode.com/d/customimport.htm.
For information on customizing the contact form, see http://www.outlookcode.com/d/forms.htm and http://www.outlookcode.com/d/contactform.htm

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Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
>I am trying to add new fields into the default contact card so that when I
> import from excell the fields will be available.