How to delete the space in the beginning of a cell in Excel 2003:

1. Select the cell(s) that contain the space you want to delete.
2. Click on the Edit menu at the top of the screen.
3. Choose Replace from the drop-down menu.
4. In the Find what field, type a single space (hit the spacebar once).
5. Leave the Replace with field blank.
6. Click on the Replace All button.
7. Excel will replace all instances of a single space at the beginning of a cell with nothing, effectively deleting it.

And that's it! The space should now be removed from the beginning of the cell(s) you selected.