1. In my Phone List View I have a field called Journal which is a tick box
field. What does this do?

It shows whether the contact has been set for automatic journaling of emails and meeting requests.

2. I have created a new field in a Contact item to hold a particular phone
number. Is it possible to display this field in the Phone Number fields
grouping on the All Fields tab of the contact form? At the moment it only
appears in the User Defined Fields In This Item group.

No.

3. I have created a new field in a Contact item, the Type is Date / Time
and the Format is March 06. When I save and close the item the format
changes to show the day, date and time. However when I use the field in a
table view, it displays the original format I set. How do I keep the
original format in the item?

Right-click the table column headings, and choose Format Columns.

4. In a Contact item on the All Fields tab the All Contacts group includes
User Field 1, 2, 3, and 4. What is the difference between these and new
fields I create?

The built-in fields can be exported with Outlook's Import and Export Wizard.

You might also find the information at http://www.outlookcode.com/d/fields.htm useful.
--
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