I want to create external links in a bunch of excel files (50-100) to one
central workbook with lookup tables.  Is there any tricky way to make the
sheets search for the lookup table workbook (such as by name) in the event
the file structure changes, i.e. if the file are moved off the network onto a
cd.  The lookup worksheet would always be kept in the directory with the log
files.  

I know you can go through and check the links in the menu in excel then
redirect the missing links to the workbook but would rather not have to do
this 50 to 100 times.