Using Auto Date Update in Word/merging

According to Word 2003's help:

1 - Click where you want to insert the date or time.

2 - On the Insert menu, click Date and Time.

3 - If you want to insert the date or time in a different language format, then click the language in the Language box.
* The Language box includes a list of the enabled editing languages. Additional date and time options may also be available, depending on the language that you selected.

4 - In the Available formats box, click a date or time format.

5 - Select whether you want the date to automatically update or to remain as originally inserted. Do one of the following:
* To insert the date and time as a field (field: A set of codes that instructs Microsoft Word to insert text, graphics, page numbers, and other material into a document automatically. For example, the DATE field inserts the current date.) that's automatically updated when you open or print the document, select the Update automatically check box.
* To maintain the original date and time as static text, clear the Update automatically check box.

Actually, I know how to use the function itself, what I'm trying to determine is if there is a way while using the automatic date update check off to prevent that from happening after the documents have been merged. In other words I do want the date to automatically update in my data source file, but not in the final document once it's been merged. More and more I'm thinking this cannot be done. Thanks anyway for your reply!