Yes, that's pretty simple. Create a new table view, turn on in-cell editing, and add the BillingInformation or Mileage property to the view to store the data.
--
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
"Nippy" <(E-Mail Removed)> wrote in message news

BF492A1-E4CA-4A80-A907-(E-Mail Removed)...
> In outlook when viewing all received email in one folder I wish to add a
> column and then be able to add a reference number in that column against any
> specific email.
>
> I have simple programming experience and wondered if it was fairly
> straightforward?