If you are going to IMPLEMENT an interface to outlook or word or excel it is best to use the GUID.

After you drag the object to an empty prg file from the object browser
change the implements line to Something like this

Implements applicationevents2 In {00020905-0000-0000-C000-000000000046}#8.0

That way it will work regardless of the path on each machine you install on.
The GUID stays the same from version to version. The above statement works for Word 8 through Word 10.

Hope this helps.