In the 1.5.4 version of the IDE you get a small start sketch when you start the IDE of does FILE-> NEW
Today I found that changing the code in:
C:\Program Files (x86)\Arduino\examples\01.Basics\BareMinimum\Bareminimum.ino
does change this start sketch, so you can add those lines you often need e.g. your favorate defines and includes etc
Is there something similar in 1.0.4?