pesky problem that's driving me crazy!!!

I’m using Word 2007. I want to change the default bullet that comes up when I type * (which is how to start a bullet list without moving your mouse to the bullet list button). I know I can do it manually by pressing the button that has the bullet list and finding the bullet I want but it’s easier if I can use the type of bullet I want by just starting the list with *. If anyone knows how to change the default bullet that comes up when * is used, please tell me!!! Thanx in advance