Outlook 2007 is the first version with the capability to show custom fields in the reading pane-- through its new form regions feature.
--
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
"Ivan Cespedes" wrote in message news

However, the custom fields will not show in the preview pane... or at least
I have not been able to do it!