That list is not showing your Contacts. It is showing names from your
autocompletion cache. You cannot control that display. If you want, you can
edit and modify your autocompletion cache, but only with third party
software:
http://www.dcs-imaging.com/products.htm

Signature
Russ Valentine
[MVP-Outlook]
>I have Outlook 2003 and when I create a new email and type one letter for
> example "j" all contacts that contains this letter are showing in a list
[quoted text clipped - 7 lines]
> Thanks,
> Oscar.