Mass operation replace

When performing the "Mass Operation Replace" function, is there a way
to populate the comments tab of the operation being replaced?

I am finding that if I replace one operation with another by performing
the replace function, that the comments from the new operation
maintenance does not populate because it did not exist before.

I'm just trying to add a simple comment without having to check out
every part # by adding a comment to the final operation of the method.

Am I missing something? I'm not one to export/import the database and
just "fix" things. So please bear with me.

Thanks,

Leigh Reynolds
Bradshaw-Medical