Create a custom message form to use by following these steps:
Create a new message.
Select the TOOLS menu
Select FORMS
Select DESIGN THIS FORM to put the message into design
view.
Select the ACTIONS tab.
Double-click the REPLY action to display the
Form Action Properties dialog box.
Clear the Enabled check box, then click OK.
Double-click the REPLY TO ALL action to display the
Form Action Properties dialog box.
Clear the Enabled check box, then click OK.
Select TOOLS from the menu again
Select FORMS
Select PUBLISH FORM
Publish the form to the Organization Forms Library or
Save it as a template and place it where everyone who
will use it can access it. You can also publish it to
individuals inbox's or a public folder.
See Sue Mosher's site for more information on form publishing:
http://www.slipstick.com/dev/formpub.htm