You probably need to find them first........
Try right clicking on a sheet tab, then "select all sheets", this will highlight all sheets in the spreadsheet, then go up to "edit" and select "find" and type in ".xls]" making sure it is "looking in" formulas.....
as a formula link to an external spreadsheet will always be in the format : =+[name.xls]Sheetname!cellreference, it will be looking for the .xls] bit
However, if there's hundreds of links (entirely likely) you may be better off with some VBA code to automate it.... not my forte at the moment : any ideas anyone ?
HTH
Chris D
A.R.,
If the manual method doesn't work, you can check out this add-in available from MSFT called "Dellinks":
http://support.microsoft.com/support/kb/articles/Q188/4/49.asp
I've used it. I sure beats trying to hunt them down. And why create code when a free add-in already exists. :-)
enjoy