Can accomplish your task with SQL 2000 DTS.
A few questions first.
You mention that you are exporting the data from SQL, are you creating the excel file or appending data?
1.What you can do is use DTS to export you data to excel
2.Update your excel file
3.Drop and recreate your sql table and import from excel
This can all be done in one DTS package.
The second option is using DTS and Visual Basic ActiveX Script
http://www.sqldts.com/default.aspx?243
Suggestion: Move your question to the SQL Server DTS and you may receive additional information.