Here's how you do it in Excel 2003:

1. record the marco.

2. right-click anywhere on a toolbar, and choose "costomize" (the last option).

3. on the top, click the "Commands" tab.

4. On the "Catrgories" list on the left, select "Macros" (third from the bottom).

5. On the right side, "Costom Botton" will appear -- drag it to the place you want it to be on the toolbar.

6. One it's on the toolbar, right-click this new button and select "Assign Macro" (the last option).

7. Choose the macro you recorded in stage 1.