You don't say what version of Outlook you are using. Outlook 2000
provides 4 User fields that you can add to forms. Open a Contact,
then choose form, Tools | Forms | Design a Form and base your new
form on the Contact form. There is a field selector: have it display
All Contact Fields, and drop them onto the form as required.
Getting Outlook to use a new form you've created automatically for
your contacts requires some coding and is not totally trivial, so you
do best to amend the default form rather than create a totally new
one.
HTH
Wicked Wizard