If I am writing different macros with my co-worker, how do we "combine" the macros so that they are accessable from the same template location ?

For example, I would like to name my macro "Test_A.dot" and his macro is "Test_B.dot" and we would have two buttons in the WORD toolbar.

But, we can't seem to change the macro names from the Normal.dot and still have WORD see the macros.

How can we do this ?