Several descriptions of MDX to Excel options I ran across when researching an MDX issue today:

http://social.msdn.microsoft.com/Forums/en/sqlanalysisservices/thread/6d2f3059-6230-410b-98ef-e6ba51be2290

http://social.msdn.microsoft.com/Forums/en-US/sqlanalysisservices/thread/e4827a4c-d576-4f3a-882a-af1ec80ccc43

One of those may give you what you need.