I have created an addin in XL 2002, and I am now about to distribute it
to users, but some of the users use XL 2000. These users have
complained that the add-in does not work because of reference errors.
Is there any way to programmatically fix the references when loading
(e.g., if Excel 10.0 Library is not available, try to load Excel 9.0
Library)?

Any help would be most appreciated.