Drums In Score Editor

Hi, I read the manual for customizing the score editor to display your drum parts properly. But when I create a new mapped instrument in the environment, and edit the parts in the drum editor, such as creating new groups, and note heads....nothing happens in the the score.

For instance if i take the B0 kick drum and change the note head, then I input that kick drum in the score editor (using a mapped score style with a kick drum voice) the kick drum will show up, but not with the new note head. For some reason no matter what I change in the new mapped instrument's drum editor the score won't reflect those changes.

Any help very much appreciated!!