I have an Excel 2003-format spreadsheet that I have opened in Excel 2007.
The spreadsheet has links to another (external) 2003-format spreadsheet which
I do not have.

In Excel 2003, when I open the file I am given a dialog box to choose
whether or not to update the links. If I choose to NOT update, then the
values as of the last time the link was updated are displayed.

In Excel 2007, opening the same spreadsheet does not give a dialog box
asking if I want to update the links. Instead, the spreadsheet opens with
all the linked cells (and those depending on the linked cells) displaying
#VALUE!, NA, or #NAME?

How can I open the spreadsheet in 2007 and have it display the last values
of the links?