Hi - just came across this Processing tool: InitSketch
http://inittemplatep5.sourceforge.net/InitSketch_P5_Tool/Home.html
It does a simple thing: loads the contents of a default text file into your sketch. If you get tired of always typing setup() etc. or want to use a custom header or comment block, this will do it.
Just tried it in Arduino 21 and it works. (OSX). Perhaps this could be included in the Arduino dist?