Outlook provides no way to change that list.

Signature
Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> In the flag to box you can change what you are flagging for instead of
> using
[quoted text clipped - 4 lines]
> the
> box so I can use it again.